Frequencies for first 10,000 rows of harm_ev variable in vehicle dataset :

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        976        9.76        9.76
          2 |          1        0.01        9.77
          3 |          4        0.04        9.81
          5 |         32        0.32       10.13
          7 |         35        0.35       10.48
          8 |        954        9.54       20.02
          9 |        148        1.48       21.50
         10 |         31        0.31       21.81
         11 |         19        0.19       22.00
         12 |      5,283       52.83       74.83
         13 |         99        0.99       75.82
         14 |         99        0.99       76.81
         15 |         24        0.24       77.05
         17 |         40        0.40       77.45
         18 |         38        0.38       77.83
         19 |          2        0.02       77.85
         20 |          5        0.05       77.90
         21 |         16        0.16       78.06
         22 |          3        0.03       78.09
         23 |         22        0.22       78.31
         24 |        175        1.75       80.06
         25 |        127        1.27       81.33
         26 |          7        0.07       81.40
         27 |         97        0.97       82.37
         28 |          2        0.02       82.39
         29 |         31        0.31       82.70
         30 |        106        1.06       83.76
         31 |         45        0.45       84.21
         32 |         60        0.60       84.81
         33 |        444        4.44       89.25
         34 |        165        1.65       90.90
         35 |        154        1.54       92.44
         36 |         23        0.23       92.67
         37 |         35        0.35       93.02
         38 |        102        1.02       94.04
         39 |         49        0.49       94.53
         40 |          4        0.04       94.57
         41 |         21        0.21       94.78
         42 |        364        3.64       98.42
         43 |         57        0.57       98.99
         44 |          5        0.05       99.04
         46 |         13        0.13       99.17
         47 |          1        0.01       99.18
         48 |          3        0.03       99.21
         51 |          7        0.07       99.28
         52 |         20        0.20       99.48
         53 |         23        0.23       99.71
         54 |         10        0.10       99.81
         60 |          1        0.01       99.82
         99 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016