          used  (Mb) gc trigger  (Mb)  max used  (Mb)
Ncells 3601716 192.4    7173281 383.1   7173281 383.1
Vcells 8421791  64.3   26191023 199.9 124880060 952.8
  gvkey  stype sid     ias   ops   sales datadate  srcdate srcs sics1                                  snms     conm tic     cusip  cik  sic
1  1004 BUSSEG  14 158.103    NA  34.769 20030531 20040531    5  5088 Aircraft and Engine Sales and Leasing AAR CORP AIR 000361105 1750 5080
2  1004 BUSSEG  10  84.811    NA 119.933 20000531 20010531    5  3559                         Manufacturing AAR CORP AIR 000361105 1750 5080
3  1004 BUSSEG  17 143.781    NA  88.130 20080531 20080531    5  5088            Aircraft Sales and Leasing AAR CORP AIR 000361105 1750 5080
4  1004 BUSSEG   7 529.584 42.89 589.328 19970531 19970531   53  5088                     AVIATION SERVICES AAR CORP AIR 000361105 1750 5080
5  1004 BUSSEG  13 190.438    NA 216.727 20020531 20040531    5  4581      Maintenance, Repair and Overhaul AAR CORP AIR 000361105 1750 5080
6  1004 BUSSEG  10  84.041    NA  97.154 20010531 20010531    5  3559                         Manufacturing AAR CORP AIR 000361105 1750 5080
[1] 13872
[1] 13484
[1] 8048
[1] 7721
     gvkey           datadate               sid              ias                ops               sales               sics1          snms               fyear           sale              cusip               cik                permno           sich            at          
 Min.   :  1004   Min.   :1993-06-30   Min.   : 1.000   Min.   :  -824.9   Min.   :-5201.00   Min.   :  -294.56   Min.   : 119   Length:52406       Min.   :1993   Min.   :     0.00   Length:52406       Length:52406       Min.   :10001   Min.   : 100   Min.   :     0.0  
 1st Qu.:  8816   1st Qu.:1995-12-31   1st Qu.: 1.000   1st Qu.:    17.9   1st Qu.:   -0.26   1st Qu.:    15.38   1st Qu.:3443   Class :character   1st Qu.:1995   1st Qu.:    18.67   Class :character   Class :character   1st Qu.:47862   1st Qu.:3443   1st Qu.:    23.0  
 Median : 19439   Median :1997-12-31   Median : 1.000   Median :    85.4   Median :    5.33   Median :    79.59   Median :4213   Mode  :character   Median :1997   Median :    98.97   Mode  :character   Mode  :character   Median :77007   Median :4213   Median :   112.1  
 Mean   : 29609   Mean   :1997-08-15   Mean   : 2.028   Mean   :  1333.3   Mean   :   97.88   Mean   :   846.15   Mean   :4721                      Mean   :1997   Mean   :  1369.41                                         Mean   :63723   Mean   :4723   Mean   :  2404.5  
 3rd Qu.: 31131   3rd Qu.:1999-03-31   3rd Qu.: 2.000   3rd Qu.:   436.2   3rd Qu.:   38.99   3rd Qu.:   391.39   3rd Qu.:6331                      3rd Qu.:1998   3rd Qu.:   521.96                                         3rd Qu.:81246   3rd Qu.:6331   3rd Qu.:   626.6  
 Max.   :277918   Max.   :2001-05-31   Max.   :45.000   Max.   :575167.0   Max.   :36041.00   Max.   :195805.00   Max.   :9995                      Max.   :2000   Max.   :195805.00                                         Max.   :93316   Max.   :9997   Max.   :716937.0  
                                                        NA's   :1666       NA's   :1945       NA's   :39          NA's   :80                                                                                                 NA's   :10481                                    
    sale_sum        
 Min.   :   -39.10  
 1st Qu.:    18.48  
 Median :    98.10  
 Mean   :  1363.61  
 3rd Qu.:   516.55  
 Max.   :195805.00  
                    
    Min.  1st Qu.   Median     Mean  3rd Qu.     Max. 
 -2.8881   0.0000   0.0000   0.0135   0.0000 999.0019 
[1] 7534
[1] 7530
    cik                cname                                                                                                    filename      rdate      cdate wordcount hits x10k x10k405 x10k405a x10ka x10ksb x10ksb40 x10ksb40a x10ksba x10kt x10kt405 x10kt405a x10kta x10q
1 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19990621-C19980103-F10\\filename-1.txt 06/21/1999 01/03/1998      2113   77   46       2        1    NA     NA       NA        NA      NA    NA       NA        NA     NA   20
2 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19990405-C19990102-F05\\filename-5.txt 04/05/1999 01/02/1999      2549   14   14      NA       NA    NA     NA       NA        NA      NA    NA       NA        NA     NA   NA
3 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19990405-C19990102-F05\\filename-4.txt 04/05/1999 01/02/1999       304    2    2      NA       NA    NA     NA       NA        NA      NA    NA       NA        NA     NA   NA
4 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19990405-C19990102-F05\\filename-1.txt 04/05/1999 01/02/1999     22415   75   46       1       NA    NA     NA       NA        NA      NA    NA       NA        NA     NA   20
5 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19980415-C19980103-F66\\filename-4.txt 04/15/1998 01/03/1998      3106   18   18      NA       NA    NA     NA       NA        NA      NA    NA       NA        NA     NA   NA
6 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19980415-C19980103-F66\\filename-3.txt 04/15/1998 01/03/1998       294    2    2      NA       NA    NA     NA       NA        NA      NA    NA       NA        NA     NA   NA
  x10qa x10qsb x10qsba x8k x8ka doctype fyend siccode item_1.01 item_1.02 item_1.03 item_1.04 item_2.01 item_2.02 item_2.03 item_2.04 item_2.05 item_2.06 item_3.01 item_3.02 item_3.03 item_4.01 item_4.02 item_5.01 item_5.02 item_5.03 item_5.04 item_5.05 item_5.06 item_5.07
1    NA     NA      NA   8   NA 10K405A  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
2    NA     NA      NA  NA   NA    EX25  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
3    NA     NA      NA  NA   NA    EX24  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
4    NA     NA      NA   8   NA  10K405  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
5    NA     NA      NA  NA   NA    EX25  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
6    NA     NA      NA  NA   NA    EX24  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
  item_5.08 item_6.01 item_6.02 item_6.03 item_6.04 item_6.05 item_6.06 item_7.01 item_8.01 item_9.01
1        NA        NA        NA        NA        NA        NA        NA                              
2        NA        NA        NA        NA        NA        NA        NA                              
3        NA        NA        NA        NA        NA        NA        NA                              
4        NA        NA        NA        NA        NA        NA        NA                              
5        NA        NA        NA        NA        NA        NA        NA                              
6        NA        NA        NA        NA        NA        NA        NA                              

             (the    1012B      10K   10K405  10K405A     10KA    10KSB  10KSB40 10KSB40A   10KSBA     10KT  10KT405 10KT405A    10KTA      10Q     10QA    10QSB   10QSBA     10QT    10QTA  10SB12G 10SB12GA      11K      18K       6K       8K   8K12G3      8KA      ARS 
     333        1        2    49127    21213     3324    14542    17327     3421      622     5118       92       82       17       26   212285    17249    65601     8543      113       20        1        1        2        2        1   217051        7    22152        1 
  DEF14A      EX1     EX10     EX11     EX12     EX13     EX14     EX15     EX16     EX17     EX18     EX19      EX2     EX20     EX21     EX22     EX23     EX24     EX25     EX26     EX27     EX28      EX3     EX31     EX32      EX4      EX5      EX6      EX7      EX8 
       1     5021    25074     1422      699     8652       45     4595     8161       81      794      184     8910     1402     1134      239    67574    11683      352        8    59695      142     1006     1202     1106     6709     1304       62      168      466 
     EX9     EX99    NT10K    NT10Q   NTN10Q 
      62    66866        1        3        2 
 [1] "cik"                    "cname"                  "filename"               "rdate"                  "cdate"                  "wordcount"              "hits"                   "confidential.request"   "confidential.treatment" "doctype"               
[11] "fyend"                  "siccode"                "item_1.01"              "item_1.02"              "item_1.03"              "item_1.04"              "item_2.01"              "item_2.02"              "item_2.03"              "item_2.04"             
[21] "item_2.05"              "item_2.06"              "item_3.01"              "item_3.02"              "item_3.03"              "item_4.01"              "item_4.02"              "item_5.01"              "item_5.02"              "item_5.03"             
[31] "item_5.04"              "item_5.05"              "item_5.06"              "item_5.07"              "item_5.08"              "item_6.01"              "item_6.02"              "item_6.03"              "item_6.04"              "item_6.05"             
[41] "item_6.06"              "item_7.01"              "item_8.01"              "item_9.01"             

     10K   10K405  10K405A     10KA    10KSB  10KSB40 10KSB40A   10KSBA     10KT  10KT405 10KT405A    10KTA      10Q     10QA    10QSB   10QSBA       8K      8KA      EX1     EX10     EX11     EX12     EX13     EX14     EX18     EX19      EX2     EX20     EX22     EX23 
    5204     2035      290     1386      595      116       25      191       15       10        2        5     3800      683      302       82      805      332      101    11841        5        4        2        1        1        8     1571        4        1        1 
    EX27     EX28      EX3      EX4      EX5      EX6      EX7      EX8      EX9     EX99 
       1        1       33     1074       17        6       10        4        4      705 

   10K    10Q 
 49127 212285 
[1] 6122
 [1] "gvkey"    "datadate" "fyear"    "conm"     "cusip"    "cik"      "fic"      "sich"     "sale"     "at"       "revt"     "permno"   "n"        "n_lg"     "n_ch"     "rdate"    "cdate"    "doctype"  "cname"    "cto"      "redact"   "edgar"   
 [1] "gvkey"    "datadate" "fyear"    "conm"     "cusip"    "cik"      "fic"      "sich"     "sale"     "at"       "revt"     "permno"   "n"        "n_lg"     "n_ch"    

  -3   -2   -1    0    1    2    3    4    5    6    7    8 
   5   30  164 5037  979  476  159   48   18    5    1    1 
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
 0.0000  0.0000  1.0000  0.6891  1.0000  1.0000 

  0   1   2   3   4   5   6   7   8 
761 979 476 159  48  18   5   1   1 
[1] 2448

  -2   -1    0    1    2    3    4    5    6    7    8 
  24  114 3524  802  422  134   44   13    4    1    1 
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
  0.000   0.000   1.000   0.721   1.000   1.000 

  0   1   2   3   4   5   6   7   8 
550 802 422 134  44  13   4   1   1 
[1] 1971
# A tibble: 6 × 5
  target_cusip acquiror_cusip date_announced      date_effective      date_withdrawn
  <chr>        <chr>          <dttm>              <dttm>              <dttm>        
1 382387       205887         1998-01-01 00:00:00 1998-07-31 00:00:00 NA            
2 49461J       911843         1998-01-02 00:00:00 1998-01-16 00:00:00 NA            
3 532776       46145M         1998-01-02 00:00:00 1998-01-02 00:00:00 NA            
4 62872G       98141A         1998-01-02 00:00:00 1998-02-27 00:00:00 NA            
5 504195       58375X         1998-01-05 00:00:00 1998-07-17 00:00:00 NA            
6 522000       72764T         1998-01-05 00:00:00 1998-05-12 00:00:00 NA            
   cusip_t            cusip_a              date_a                            date_e                            date_w    
 Length:2001        Length:2001        Min.   :1998-01-01 00:00:00.000   Min.   :1998-01-02 00:00:00.000   Min.   :NA    
 Class :character   Class :character   1st Qu.:1998-06-02 00:00:00.000   1st Qu.:1998-08-21 00:00:00.000   1st Qu.:NA    
 Mode  :character   Mode  :character   Median :1998-11-11 00:00:00.000   Median :1999-02-03 00:00:00.000   Median :NA    
                                       Mean   :1998-11-19 19:50:17.090   Mean   :1999-02-04 07:29:03.327   Mean   :NaN   
                                       3rd Qu.:1999-05-06 00:00:00.000   3rd Qu.:1999-07-30 00:00:00.000   3rd Qu.:NA    
                                       Max.   :1999-12-30 00:00:00.000   Max.   :1999-12-30 00:00:00.000   Max.   :NA    
                                                                                                           NA's   :2001  
[1] 1919

   0    1 
 550 1369 
    cik                cname                                                                                                    filename      rdate      cdate wordcount hits x10k x10k405 x10k405a x10ka x10ksb x10ksb40 x10ksb40a x10ksba x10kt x10kt405 x10kt405a x10kta x10q
1 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19990621-C19980103-F10\\filename-1.txt 06/21/1999 01/03/1998      2113   77   46       2        1    NA     NA       NA        NA      NA    NA       NA        NA     NA   20
2 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19990405-C19990102-F05\\filename-5.txt 04/05/1999 01/02/1999      2549   14   14      NA       NA    NA     NA       NA        NA      NA    NA       NA        NA     NA   NA
3 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19990405-C19990102-F05\\filename-4.txt 04/05/1999 01/02/1999       304    2    2      NA       NA    NA     NA       NA        NA      NA    NA       NA        NA     NA   NA
4 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19990405-C19990102-F05\\filename-1.txt 04/05/1999 01/02/1999     22415   75   46       1       NA    NA     NA       NA        NA      NA    NA       NA        NA     NA   20
5 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19980415-C19980103-F66\\filename-4.txt 04/15/1998 01/03/1998      3106   18   18      NA       NA    NA     NA       NA        NA      NA    NA       NA        NA     NA   NA
6 99974 TJ INTERNATIONAL INC S:\\directEDGAR_ACCOUNTING\\10KMASTER\\Y1994-Y2004\\FILINGS\\99974\\R19980415-C19980103-F66\\filename-3.txt 04/15/1998 01/03/1998       294    2    2      NA       NA    NA     NA       NA        NA      NA    NA       NA        NA     NA   NA
  x10qa x10qsb x10qsba x8k x8ka doctype fyend siccode item_1.01 item_1.02 item_1.03 item_1.04 item_2.01 item_2.02 item_2.03 item_2.04 item_2.05 item_2.06 item_3.01 item_3.02 item_3.03 item_4.01 item_4.02 item_5.01 item_5.02 item_5.03 item_5.04 item_5.05 item_5.06 item_5.07
1    NA     NA      NA   8   NA 10K405A  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
2    NA     NA      NA  NA   NA    EX25  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
3    NA     NA      NA  NA   NA    EX24  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
4    NA     NA      NA   8   NA  10K405  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
5    NA     NA      NA  NA   NA    EX25  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
6    NA     NA      NA  NA   NA    EX24  1231    2430                  NA                  NA                                      NA        NA        NA        NA        NA        NA                  NA                                      NA        NA        NA        NA
  item_5.08 item_6.01 item_6.02 item_6.03 item_6.04 item_6.05 item_6.06 item_7.01 item_8.01 item_9.01
1        NA        NA        NA        NA        NA        NA        NA                              
2        NA        NA        NA        NA        NA        NA        NA                              
3        NA        NA        NA        NA        NA        NA        NA                              
4        NA        NA        NA        NA        NA        NA        NA                              
5        NA        NA        NA        NA        NA        NA        NA                              
6        NA        NA        NA        NA        NA        NA        NA                              

             (the    1012B      10K   10K405  10K405A     10KA    10KSB  10KSB40 10KSB40A   10KSBA     10KT  10KT405 10KT405A    10KTA      10Q     10QA    10QSB   10QSBA     10QT    10QTA  10SB12G 10SB12GA      11K      18K       6K       8K   8K12G3      8KA      ARS 
     333        1        2    49127    21213     3324    14542    17327     3421      622     5118       92       82       17       26   212285    17249    65601     8543      113       20        1        1        2        2        1   217051        7    22152        1 
  DEF14A      EX1     EX10     EX11     EX12     EX13     EX14     EX15     EX16     EX17     EX18     EX19      EX2     EX20     EX21     EX22     EX23     EX24     EX25     EX26     EX27     EX28      EX3     EX31     EX32      EX4      EX5      EX6      EX7      EX8 
       1     5021    25074     1422      699     8652       45     4595     8161       81      794      184     8910     1402     1134      239    67574    11683      352        8    59695      142     1006     1202     1106     6709     1304       62      168      466 
     EX9     EX99    NT10K    NT10Q   NTN10Q 
      62    66866        1        3        2 
 [1] "cik"                    "cname"                  "filename"               "rdate"                  "cdate"                  "wordcount"              "hits"                   "confidential.request"   "confidential.treatment" "doctype"               
[11] "fyend"                  "siccode"                "item_1.01"              "item_1.02"              "item_1.03"              "item_1.04"              "item_2.01"              "item_2.02"              "item_2.03"              "item_2.04"             
[21] "item_2.05"              "item_2.06"              "item_3.01"              "item_3.02"              "item_3.03"              "item_4.01"              "item_4.02"              "item_5.01"              "item_5.02"              "item_5.03"             
[31] "item_5.04"              "item_5.05"              "item_5.06"              "item_5.07"              "item_5.08"              "item_6.01"              "item_6.02"              "item_6.03"              "item_6.04"              "item_6.05"             
[41] "item_6.06"              "item_7.01"              "item_8.01"              "item_9.01"             

     10K   10K405  10K405A     10KA    10KSB  10KSB40 10KSB40A   10KSBA     10KT  10KT405 10KT405A    10KTA      10Q     10QA    10QSB   10QSBA       8K      8KA      EX1     EX10     EX11     EX12     EX13     EX14     EX18     EX19      EX2     EX20     EX22     EX23 
    5204     2035      290     1386      595      116       25      191       15       10        2        5     3800      683      302       82      805      332      101    11841        5        4        2        1        1        8     1571        4        1        1 
    EX27     EX28      EX3      EX4      EX5      EX6      EX7      EX8      EX9     EX99 
       1        1       33     1074       17        6       10        4        4      705 
 [1] "cik"      "gvkey"    "datadate" "fyear"    "conm"     "cusip"    "fic"      "sich"     "sale"     "at"       "revt"     "permno"   "n"        "n_lg"     "n_ch"     "rdate"    "cdate"    "doctype"  "cname"    "redact"   "early"   
[1] 1919
  fyear sic  gvkey   datadate fic        cik exchg      ib      ni      at      lt    revt    cogs    xsga  xrd prcc_f   csho     ceq sich ebitda    sale   ppegt     dp txditc   pstk   dltt    dlc     che permno ln_asset ebitda_ratio  rd_ratio       mtb         cash  leverage
1  1992 100 003107 1992-12-31 USA 0000764065    11  30.800  -7.900 537.200 267.600 310.700 238.300  34.100   NA 35.625 11.989 269.600 1000 38.300 310.700 176.900  2.800    0.0  0.000 75.000  0.100 128.600  27422 6.286370    0.1232700        NA 1.5842290 0.2393894267 0.4981385
2  1992 100 022578 1992-12-31 USA 0000824103    19  -1.422  -1.422   6.223   2.555   4.060   5.206      NA   NA  1.750  8.349   3.668  100 -1.146   4.060   3.211  0.343    0.0  0.000  1.295  0.555   0.278  76862 1.828254   -0.2822660        NA 3.9833013 0.0446729873 0.4105737
3  1992 100 024479 1992-07-31 CAN 0000870203    13  -6.248  -6.248  15.403   8.662   0.694   3.057   0.843   NA  2.000  7.319   6.741 1000 -3.206   0.694  14.665  2.676    0.0  0.000  0.735  7.446   0.349  76922 2.734563   -4.6195965        NA 2.1714879 0.0226579238 0.5623580
4  1992 100 013550 1992-12-31 USA 0000792161    19   1.302   1.302  64.281   8.506  11.763   8.037   0.844   NA  4.875  7.500  55.775  100  2.882  11.763  66.116  1.417    0.0  0.000  0.386  3.881   0.032  69534 4.163264    0.2450055        NA 0.6555356 0.0004978143 0.1323253
5  1992 100 014881 1992-08-31 USA 0000835015    11  10.000  10.000 303.400 187.900 300.200 148.905 128.600 42.2 28.000  5.122 115.500  100 22.695 300.200 225.500 10.395   17.8  0.000 90.100 26.100   9.400  12006 5.715052    0.0755996 0.1405730 1.2416968 0.0309822017 0.6193144
6  1992 100 013468 1992-12-31 USA 0000813742    14 -30.370 -30.370 212.753  34.928  33.994  20.936  22.789  8.5 14.000 16.904 106.883  100 -9.731  33.994  52.831  3.198    0.0 39.564  0.000  3.800  68.448  11450 5.360132   -0.2862564 0.2500441 2.2141594 0.3217251931 0.1641716
          roa         om         gm          pm        q sale_ld    tsale    tcogs   txsga     tdp marketsize substitute  marketshare          ppe sale_lg   at_lg entrycost ebitda_sic    om_sic    gm_sic     roa_sic ebitda_adj    om_adj    gm_adj     roa_adj    sale_grow
1  0.05733433  0.1232700  0.2330222  0.09913099 1.293202 307.800 16338.46 12363.84 1742.73 987.108   9.701277    1.08247 1.901648e-02 3.3640155415 310.700 537.200   7.78539  -2.427009 -3.035707 -1.482099 -0.08102415   2.550279  3.158977  1.715121  0.13835847 -0.009333762
2 -0.22850715         NA -0.2822660 -0.35024631 2.758436   4.247 16338.46 12363.84 1742.73 987.108   9.701277    1.08247 2.484934e-04 0.0007979125   4.060   6.223   7.78539  -2.427009 -3.035707 -1.482099 -0.08102415   2.144743        NA  1.199833 -0.14748300  0.046059113
3 -0.40563527 -4.6195965 -3.4048991 -9.00288184 1.512692      NA 16338.46 12363.84 1742.73 987.108   9.701277    1.08247 4.247647e-05 0.0006229174   0.694  15.403   7.78539  -2.427009 -3.035707 -1.482099 -0.08102415  -2.192588 -1.583890 -1.922800 -0.32461112           NA
4  0.02025482  0.2450055  0.3167559  0.11068605 0.701117  10.247 16338.46 12363.84 1742.73 987.108   9.701277    1.08247 7.199577e-04 0.0476007259  11.763  64.281   7.78539  -2.427009 -3.035707 -1.482099 -0.08102415   2.672014  3.280713  1.798855  0.10127897 -0.128878687
5  0.03295979  0.0755996  0.5039807  0.03331113 1.033342 291.500 16338.46 12363.84 1742.73 987.108   9.701277    1.08247 1.837383e-02 4.1432977247 300.200 303.400   7.78539  -2.427009 -3.035707 -1.482099 -0.08102415   2.502608  3.111307  1.986080  0.11398394 -0.028980680
6 -0.14274769 -0.2862564  0.3841266 -0.89339295 1.609970 120.513 16338.46 12363.84 1742.73 987.108   9.701277    1.08247 2.080612e-03 0.1099208324  33.994 212.753   7.78539  -2.427009 -3.035707 -1.482099 -0.08102415   2.140752  2.749451  1.866226 -0.06172355  2.545125610

 1992  1993  1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015 
 8119  9377  9861 10740 10924 10670 11017 11106 10625 10008  9547  9281  9089  8872  8643  8246  8005  7863  7724  7648  7904  7908  7717  7429 
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
 0.0000  0.0000  0.0000  0.4891  1.0000  1.0000 
     gvkey           datadate              fyear          permno          fic                 sich           cik              conm                sale                 at                 revt               cdate              doctype              redact           early     
 Min.   :  1013   Min.   :1993-10-31   Min.   :1993   Min.   :10001   Length:9715        Min.   : 100   Min.   :   1923   Length:9715        Min.   :     0.01   Min.   :     0.08   Min.   :     0.01   Min.   :1993-03-31   Length:9715        Min.   :0.0000   Min.   :1     
 1st Qu.:  6121   1st Qu.:1996-12-31   1st Qu.:1996   1st Qu.:36898   Class :character   1st Qu.:3312   1st Qu.:  79282   Class :character   1st Qu.:    77.39   1st Qu.:    77.88   1st Qu.:    77.39   1st Qu.:1996-03-31   Class :character   1st Qu.:0.0000   1st Qu.:1     
 Median : 11218   Median :1997-12-31   Median :1997   Median :65859   Mode  :character   Median :3823   Median : 732717   Mode  :character   Median :   273.64   Median :   274.42   Median :   273.64   Median :1997-05-31   Mode  :character   Median :0.0000   Median :1     
 Mean   : 19683   Mean   :1998-03-08   Mean   :1997   Mean   :57803                      Mean   :4481   Mean   : 536178                      Mean   :  1706.13   Mean   :  2290.16   Mean   :  1706.13   Mean   :1997-06-28                      Mean   :0.0773   Mean   :1     
 3rd Qu.: 25631   3rd Qu.:1999-10-31   3rd Qu.:1999   3rd Qu.:80220                      3rd Qu.:5812   3rd Qu.: 883237                      3rd Qu.:  1009.92   3rd Qu.:  1048.98   3rd Qu.:  1009.92   3rd Qu.:1999-02-27                      3rd Qu.:0.0000   3rd Qu.:1     
 Max.   :124254   Max.   :2001-05-31   Max.   :2000   Max.   :92874                      Max.   :9997   Max.   :1090061                      Max.   :170064.00   Max.   :306577.00   Max.   :170064.00   Max.   :2000-12-31                      Max.   :1.0000   Max.   :1     
                                                      NA's   :359                                                                                                                                                                                                 NA's   :3863  
     treat            prcc_f            exchg          ln_asset        ebitda_adj          rd_ratio         marketsize      ebitda_ratio        entrycost       marketshare          substitute          mtb               cash            leverage             om         
 Min.   :0.0000   Min.   :  0.010   Min.   : 0.00   Min.   : 1.269   Min.   :-0.65557   Min.   :0.00000   Min.   : 6.424   Min.   :-3.73206   Min.   : 3.579   Min.   :0.0000085   Min.   :0.9465   Min.   :-10.808   Min.   :0.00000   Min.   :0.06965   Min.   :-3.5444  
 1st Qu.:0.0000   1st Qu.:  6.125   1st Qu.:11.00   1st Qu.: 4.357   1st Qu.: 0.02519   1st Qu.:0.00000   1st Qu.: 9.607   1st Qu.: 0.05612   1st Qu.: 6.517   1st Qu.:0.0012233   1st Qu.:1.0703   1st Qu.:  1.075   1st Qu.:0.01518   1st Qu.:0.37494   1st Qu.: 0.0522  
 Median :1.0000   Median : 15.000   Median :14.00   Median : 5.615   Median : 0.18013   Median :0.00000   Median :10.595   Median : 0.11520   Median : 7.671   Median :0.0083096   Median :1.1099   Median :  1.797   Median :0.04940   Median :0.55340   Median : 0.1072  
 Mean   :0.6911   Mean   : 20.704   Mean   :13.65   Mean   : 5.685   Mean   : 2.22919   Mean   :0.03961   Mean   :10.633   Mean   : 0.08285   Mean   : 7.747   Mean   :0.0482551   Mean   :1.1265   Mean   :  2.556   Mean   :0.11506   Mean   :0.55081   Mean   : 0.0740  
 3rd Qu.:1.0000   3rd Qu.: 28.375   3rd Qu.:14.00   3rd Qu.: 6.956   3rd Qu.: 1.64831   3rd Qu.:0.02833   3rd Qu.:11.853   3rd Qu.: 0.18291   3rd Qu.: 9.119   3rd Qu.:0.0419945   3rd Qu.:1.1491   3rd Qu.:  3.045   3rd Qu.:0.15225   3rd Qu.:0.69660   3rd Qu.: 0.1670  
 Max.   :1.0000   Max.   :616.875   Max.   :20.00   Max.   :10.752   Max.   :53.36357   Max.   :1.33257   Max.   :13.850   Max.   : 0.61593   Max.   :11.199   Max.   :0.6906814   Max.   :1.8582   Max.   : 23.695   Max.   :0.76866   Max.   :1.85053   Max.   : 0.5330  
                                                                                                                                                                                                                                                          NA's   :1467     
     om_adj             roa                   gm              gm_adj            roa_adj                 q             sale_grow             pm             missing_rd   
 Min.   :-1.2340   Min.   :-1.5755810   Min.   :-0.5013   Min.   :-0.30583   Min.   :-14.795358   Min.   : 0.5297   Min.   :-0.8493   Min.   :-6.38191   Min.   :0.000  
 1st Qu.: 0.0247   1st Qu.:-0.0028760   1st Qu.: 0.2031   1st Qu.:-0.02900   1st Qu.:  0.008174   1st Qu.: 1.0331   1st Qu.:-0.0298   1st Qu.:-0.00274   1st Qu.:0.000  
 Median : 0.1503   Median : 0.0362163   Median : 0.3141   Median : 0.08173   Median :  0.082789   Median : 1.3285   Median : 0.0789   Median : 0.03528   Median :0.000  
 Mean   : 1.0144   Mean   :-0.0005037   Mean   : 0.3290   Mean   : 1.41512   Mean   :  0.141624   Mean   : 1.7782   Mean   : 0.1384   Mean   :-0.03593   Mean   :0.487  
 3rd Qu.: 0.7801   3rd Qu.: 0.0727853   3rd Qu.: 0.4390   3rd Qu.: 0.77279   3rd Qu.:  0.215867   3rd Qu.: 1.9913   3rd Qu.: 0.2159   3rd Qu.: 0.07253   3rd Qu.:1.000  
 Max.   :30.1068   Max.   : 0.2684503   Max.   : 0.8675   Max.   :28.88334   Max.   :  9.785127   Max.   :11.7133   Max.   : 2.8581   Max.   : 0.37964   Max.   :1.000  
 NA's   :1467                                                                                     NA's   :554       NA's   :417                                         
[1] 1847

   0    1 
 531 1316 

1993 1994 1995 1996 1997 1998 1999 2000 
 324  587  962 1542 1677 1799 1511 1313 

   0    1 
 531 1316 

   0    1 
3001 6714 
[1] 244
          used  (Mb) gc trigger   (Mb)  max used   (Mb)
Ncells 3666845 195.9    8802868  470.2   8802868  470.2
Vcells 9672727  73.8  190001126 1449.6 237498567 1812.0
         X Mkt.RF   SMB   HML    RF
1 19260701   0.10 -0.24 -0.28 0.009
2 19260702   0.45 -0.32 -0.08 0.009
3 19260706   0.17  0.27 -0.35 0.009
4 19260707   0.09 -0.59  0.03 0.009
5 19260708   0.21 -0.36  0.15 0.009
6 19260709  -0.71  0.44  0.56 0.009
           used  (Mb) gc trigger   (Mb)  max used   (Mb)
Ncells  3814775 203.8    8802868  470.2   8802868  470.2
Vcells 42464034 324.0  148001615 1129.2 237498567 1812.0
     Min.   1st Qu.    Median      Mean   3rd Qu.      Max. 
  -2.8881    0.0000    0.0000    0.0369    0.0000 1978.3333 
     sic3               tsale             ros_sic3            sale_sic3       
 Length:348         Min.   :     0.3   Min.   :-105.53583   Min.   :    0.32  
 Class :character   1st Qu.:  1025.7   1st Qu.:  -0.16340   1st Qu.:  145.64  
 Mode  :character   Median :  5278.1   Median :   0.03234   Median :  331.64  
                    Mean   : 26585.6   Mean   :  -0.94559   Mean   :  882.28  
                    3rd Qu.: 23049.5   3rd Qu.:   0.09185   3rd Qu.:  724.50  
                    Max.   :619624.1   Max.   :   1.25280   Max.   :62726.00  
[1] "gvkey"        "treat"        "datadate.x"   "spread_ros.x" "min_ros"      "max_ros"      "datadate.y"   "spread_ros.y"
     gvkey            treat   datadate_post        spread_ros_post       min_ros             max_ros          datadate_pre        spread_ros_pre       ch_spread       
 Min.   :  1013   Min.   :1   Min.   :1998-12-31   Min.   :  0.0000   Min.   :-337.9055   Min.   :-59.2976   Min.   :1997-12-31   Min.   : 0.00000   Min.   :-10.4997  
 1st Qu.:  7881   1st Qu.:1   1st Qu.:1998-12-31   1st Qu.:  0.0718   1st Qu.:  -0.0493   1st Qu.:  0.1936   1st Qu.:1997-12-31   1st Qu.: 0.00000   1st Qu.:  0.0525  
 Median : 15713   Median :1   Median :1998-12-31   Median :  0.1713   Median :   0.1145   Median :  1.4639   Median :1997-12-31   Median : 0.00000   Median :  0.1483  
 Mean   : 26462   Mean   :1   Mean   :1999-02-28   Mean   :  2.1115   Mean   :   0.0665   Mean   :  3.0843   Mean   :1998-03-05   Mean   : 0.05412   Mean   :  2.0544  
 3rd Qu.: 30934   3rd Qu.:1   3rd Qu.:1999-03-31   3rd Qu.:  0.4375   3rd Qu.:   2.0879   3rd Qu.:  5.3860   3rd Qu.:1998-04-07   3rd Qu.: 0.00000   3rd Qu.:  0.4061  
 Max.   :122233   Max.   :1   Max.   :1999-11-30   Max.   :366.7050   Max.   :  29.1351   Max.   : 39.5011   Max.   :1998-11-30   Max.   :11.47541   Max.   :366.7050  
                              NA's   :72           NA's   :72         NA's   :78          NA's   :78         NA's   :20                              NA's   :72        
[1] "gvkey"        "treat"        "datadate.x"   "spread_ros.x" "min_ros"      "max_ros"      "datadate.y"   "spread_ros.y"
           used  (Mb) gc trigger  (Mb)  max used   (Mb)
Ncells  4111193 219.6    8802868 470.2   8802868  470.2
Vcells 28285924 215.9  118401292 903.4 237498567 1812.0
         X Mkt.RF   SMB   HML    RF
1 19260701   0.10 -0.24 -0.28 0.009
2 19260702   0.45 -0.32 -0.08 0.009
3 19260706   0.17  0.27 -0.35 0.009
4 19260707   0.09 -0.59  0.03 0.009
5 19260708   0.21 -0.36  0.15 0.009
6 19260709  -0.71  0.44  0.56 0.009
[1] "1995-12-24"
[1] "1995-05-15"

   1    2    4    5    6    7   10   12   13   15   21   22   24   26   27   29   31   33   34   35   42   51   52   53   54   55   58   59   60   62   64   69   70   76   78   81   88   89   90   91   93   94   97   98  101  104  106  108  110  118  121  122  124  128  129 
   1    1    1    2    3    1    1    1    1    3    1    4    3    1    1    1    2    3    1    2    2    1    1    1    1    1    2    2    1    1    1    1    1    2    1    2    2    1    1    3    1    1    4    3    2    1    1    2    1    2    1    1    1    1    2 
 132  133  136  142  143  147  149  152  154  155  156  264  308  310  312 
   2    1    1    1    2    1    1    3  138  110 1106    1    3    2   19 
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
    1.0   156.0   156.0   152.6   156.0   312.0 
     gvkey           datadate              fyear          permno           sich           sale          
 Min.   :  1004   Min.   :1995-06-30   Min.   :1995   Min.   :10001   Min.   : 100   Min.   :     0.00  
 1st Qu.: 10508   1st Qu.:1996-12-31   1st Qu.:1996   1st Qu.:52919   1st Qu.:3452   1st Qu.:    16.07  
 Median : 24505   Median :1997-12-31   Median :1997   Median :77735   Median :4812   Median :    87.49  
 Mean   : 36473   Mean   :1997-12-17   Mean   :1997   Mean   :65540   Mean   :4781   Mean   :  1230.67  
 3rd Qu.: 62123   3rd Qu.:1998-12-31   3rd Qu.:1998   3rd Qu.:82266   3rd Qu.:6411   3rd Qu.:   455.65  
 Max.   :277918   Max.   :2000-05-31   Max.   :1999   Max.   :93316   Max.   :9997   Max.   :174694.00  
                                                      NA's   :13856                                     
     gvkey           datadate               sid             sics1          sic3               sales                ops                fyear          permno           sich           sale         
 Min.   :  1004   Min.   :1998-12-31   Min.   : 1.000   Min.   : 100   Length:16228       Min.   :     0.00   Min.   :-3538.000   Min.   :1998   Min.   :10001   Min.   : 100   Min.   :     0.0  
 1st Qu.:  8972   1st Qu.:1998-12-31   1st Qu.: 1.000   1st Qu.:3492   Class :character   1st Qu.:    11.92   1st Qu.:   -0.668   1st Qu.:1998   1st Qu.:47706   1st Qu.:3440   1st Qu.:    32.8  
 Median : 22816   Median :1998-12-31   Median : 2.000   Median :4813   Mode  :character   Median :    65.30   Median :    4.359   Median :1998   Median :77428   Median :4812   Median :   193.1  
 Mean   : 38156   Mean   :1999-02-25   Mean   : 3.865   Mean   :4875                      Mean   :   739.32   Mean   :   75.311   Mean   :1998   Mean   :64286   Mean   :4781   Mean   :  2600.4  
 3rd Qu.: 62746   3rd Qu.:1999-03-31   3rd Qu.: 5.000   3rd Qu.:6792                      3rd Qu.:   342.71   3rd Qu.:   35.122   3rd Qu.:1998   3rd Qu.:83161   3rd Qu.:6361   3rd Qu.:  1103.2  
 Max.   :277918   Max.   :1999-11-30   Max.   :44.000   Max.   :9995                      Max.   :118017.00   Max.   :30530.000   Max.   :1999   Max.   :93316   Max.   :9997   Max.   :158514.0  
                                                                                                              NA's   :671                        NA's   :3343                                     
     gvkey           datadate               sid             sics1          sic3               sales                ops                fyear          permno           sich           sale                wt                 WT                 ros            
 Min.   :  1004   Min.   :1998-12-31   Min.   : 1.000   Min.   : 100   Length:16228       Min.   :     0.00   Min.   :-3538.000   Min.   :1998   Min.   :10001   Min.   : 100   Min.   :     0.0   Min.   :  0.0000   Min.   :   0.1248   Min.   :-2022.1552  
 1st Qu.:  8972   1st Qu.:1998-12-31   1st Qu.: 1.000   1st Qu.:3492   Class :character   1st Qu.:    11.92   1st Qu.:   -0.668   1st Qu.:1998   1st Qu.:47706   1st Qu.:3440   1st Qu.:    32.8   1st Qu.:  0.1650   1st Qu.:   1.0000   1st Qu.:   -0.0101  
 Median : 22816   Median :1998-12-31   Median : 2.000   Median :4813   Mode  :character   Median :    65.30   Median :    4.359   Median :1998   Median :77428   Median :4812   Median :   193.1   Median :  0.5369   Median :   1.0000   Median :    0.0186  
 Mean   : 38156   Mean   :1999-02-25   Mean   : 3.865   Mean   :4875                      Mean   :   739.32   Mean   :   75.311   Mean   :1998   Mean   :64286   Mean   :4781   Mean   :  2600.4   Mean   :  0.6209   Mean   :   1.1814   Mean   :   -1.8576  
 3rd Qu.: 62746   3rd Qu.:1999-03-31   3rd Qu.: 5.000   3rd Qu.:6792                      3rd Qu.:   342.71   3rd Qu.:   35.122   3rd Qu.:1998   3rd Qu.:83161   3rd Qu.:6361   3rd Qu.:  1103.2   3rd Qu.:  1.0000   3rd Qu.:   1.0000   3rd Qu.:    0.0718  
 Max.   :277918   Max.   :1999-11-30   Max.   :44.000   Max.   :9995                      Max.   :118017.00   Max.   :30530.000   Max.   :1999   Max.   :93316   Max.   :9997   Max.   :158514.0   Max.   :762.5255   Max.   :1000.0019   Max.   :    1.4043  
                                                                                                              NA's   :671                        NA's   :3343                                                                             NA's   :671         
tmp3$WT 
       n  missing distinct     Info     Mean  pMedian      Gmd      .05      .10      .25      .50      .75      .90      .95 
   16228        0     1493    0.627    1.181        1   0.4223   0.9345   0.9905   1.0000   1.0000   1.0000   1.0019   1.0329 

lowest : 0.124832 0.184896 0.281215 0.284483 0.359281, highest: 3.20354  3.36697  6.33103  16.4463  1000    
     gvkey           datadate               sid             sics1          sic3               sales                ops                fyear          permno           sich           sale                 wt                 ros            
 Min.   :  1004   Min.   :1998-12-31   Min.   : 1.000   Min.   : 100   Length:13379       Min.   :     0.00   Min.   :-2569.400   Min.   :1998   Min.   :10001   Min.   : 100   Min.   :     0.00   Min.   :0.0000209   Min.   :-2022.1552  
 1st Qu.:  9300   1st Qu.:1998-12-31   1st Qu.: 1.000   1st Qu.:3527   Class :character   1st Qu.:    11.06   1st Qu.:   -0.944   1st Qu.:1998   1st Qu.:48717   1st Qu.:3448   1st Qu.:    26.25   1st Qu.:0.1995584   1st Qu.:   -0.0177  
 Median : 24197   Median :1998-12-31   Median : 2.000   Median :4813   Mode  :character   Median :    59.53   Median :    3.632   Median :1998   Median :77546   Median :4610   Median :   155.72   Median :0.6886025   Median :    0.0188  
 Mean   : 39208   Mean   :1999-02-27   Mean   : 3.547   Mean   :4886                      Mean   :   660.13   Mean   :   69.673   Mean   :1998   Mean   :64719   Mean   :4798   Mean   :  2099.83   Mean   :0.6085482   Mean   :   -2.1662  
 3rd Qu.: 63077   3rd Qu.:1999-03-31   3rd Qu.: 4.000   3rd Qu.:6798                      3rd Qu.:   300.63   3rd Qu.:   31.337   3rd Qu.:1998   3rd Qu.:83218   3rd Qu.:6513   3rd Qu.:   850.99   3rd Qu.:1.0000000   3rd Qu.:    0.0762  
 Max.   :277918   Max.   :1999-11-30   Max.   :44.000   Max.   :9995                      Max.   :118017.00   Max.   :30530.000   Max.   :1999   Max.   :93316   Max.   :9997   Max.   :144416.00   Max.   :1.0063805   Max.   :    1.0300  
                                                                                                              NA's   :453                        NA's   :2780                                                           NA's   :453         
 [1] "ticker"      "cusip"       "oftic"       "cname"       "statpers"    "measure"     "fiscalp"     "fpi"         "estflag"     "meanest"     "fpedats"     "actual"      "anndats_act" "anntims_act"
     gvkey           datadate               cik              fyear           sich          treat       redact           ln_asset        ebitda_adj         missing_rd        rd_ratio            mtb               cash            leverage         marketsize       substitute    
 Min.   :  1013   Min.   :1993-10-31   Min.   :   1952   Min.   :1993   Min.   : 100   Min.   :1   Min.   :0.00000   Min.   : 1.269   Min.   :-0.65557   Min.   :0.0000   Min.   :0.00000   Min.   :-10.808   Min.   :0.00000   Min.   :0.06965   Min.   : 6.424   Min.   :0.9465  
 1st Qu.:  6502   1st Qu.:1996-12-31   1st Qu.:  94673   1st Qu.:1996   1st Qu.:3390   1st Qu.:1   1st Qu.:0.00000   1st Qu.: 4.264   1st Qu.: 0.03404   1st Qu.:0.0000   1st Qu.:0.00000   1st Qu.:  1.087   1st Qu.:0.01657   1st Qu.:0.35740   1st Qu.: 9.628   1st Qu.:1.0694  
 Median : 12697   Median :1998-02-14   Median : 779681   Median :1997   Median :3829   Median :1   Median :0.00000   Median : 5.466   Median : 0.23516   Median :0.0000   Median :0.00000   Median :  1.852   Median :0.05635   Median :0.53620   Median :10.635   Median :1.1102  
 Mean   : 21893   Mean   :1998-03-27   Mean   : 589223   Mean   :1997   Mean   :4626   Mean   :1   Mean   :0.09175   Mean   : 5.569   Mean   : 2.50729   Mean   :0.4477   Mean   :0.04864   Mean   :  2.672   Mean   :0.12599   Mean   :0.54046   Mean   :10.678   Mean   :1.1280  
 3rd Qu.: 28781   3rd Qu.:1999-11-30   3rd Qu.: 896841   3rd Qu.:1999   3rd Qu.:6211   3rd Qu.:1   3rd Qu.:0.00000   3rd Qu.: 6.793   3rd Qu.: 2.19204   3rd Qu.:1.0000   3rd Qu.:0.04176   3rd Qu.:  3.150   3rd Qu.:0.17319   3rd Qu.:0.69055   3rd Qu.:11.918   3rd Qu.:1.1471  
 Max.   :122233   Max.   :2001-05-31   Max.   :1080280   Max.   :2000   Max.   :8744   Max.   :1   Max.   :1.00000   Max.   :10.752   Max.   :53.36357   Max.   :1.0000   Max.   :1.33257   Max.   : 23.695   Max.   :0.76866   Max.   :1.85053   Max.   :13.850   Max.   :1.8582  
                                                                                                                                                                                                                                                                                   
  marketshare          entrycost          fic                exchg           prcc_f            early           post            sic              fyearsic            deviate       
 Min.   :0.0000085   Min.   : 3.579   Length:6714        Min.   : 0.00   Min.   :  0.010   Min.   :1      Min.   :0.0000   Length:6714        Length:6714        Min.   :0.00000  
 1st Qu.:0.0010988   1st Qu.: 6.492   Class :character   1st Qu.:11.00   1st Qu.:  5.875   1st Qu.:1      1st Qu.:0.0000   Class :character   Class :character   1st Qu.:0.00000  
 Median :0.0073471   Median : 7.609   Mode  :character   Median :14.00   Median : 13.938   Median :1      Median :1.0000   Mode  :character   Mode  :character   Median :0.00000  
 Mean   :0.0419404   Mean   : 7.734                      Mean   :13.75   Mean   : 19.225   Mean   :1      Mean   :0.6607                                         Mean   :0.07566  
 3rd Qu.:0.0349363   3rd Qu.: 9.124                      3rd Qu.:14.00   3rd Qu.: 26.937   3rd Qu.:1      3rd Qu.:1.0000                                         3rd Qu.:0.00000  
 Max.   :0.6906814   Max.   :11.199                      Max.   :20.00   Max.   :440.000   Max.   :1      Max.   :1.0000                                         Max.   :1.00000  
                                                                                           NA's   :3021                                                                           
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
0.00000 0.00000 0.00000 0.07566 0.00000 1.00000 

1995 1996 1997 1998 1999 2000 
 622 1073 1189 1286 1049  905 
