Frequencies for harm_ev variable in vehnit dataset :

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         30        2.36        2.36
          7 |          3        0.24        2.59
          8 |        145       11.40       13.99
          9 |          8        0.63       14.62
         10 |          6        0.47       15.09
         11 |          1        0.08       15.17
         12 |        301       23.66       38.84
         13 |          4        0.31       39.15
         14 |        502       39.47       78.62
         16 |          5        0.39       79.01
         18 |          8        0.63       79.64
         19 |          1        0.08       79.72
         20 |          1        0.08       79.80
         23 |          1        0.08       79.87
         24 |         12        0.94       80.82
         25 |          3        0.24       81.05
         27 |          8        0.63       81.68
         29 |          4        0.31       82.00
         30 |         29        2.28       84.28
         31 |         11        0.86       85.14
         32 |          4        0.31       85.46
         33 |         57        4.48       89.94
         34 |          5        0.39       90.33
         35 |          7        0.55       90.88
         36 |          1        0.08       90.96
         38 |         15        1.18       92.14
         39 |          7        0.55       92.69
         41 |          9        0.71       93.40
         42 |         29        2.28       95.68
         43 |         10        0.79       96.46
         45 |         22        1.73       98.19
         46 |          1        0.08       98.27
         47 |          1        0.08       98.35
         51 |          1        0.08       98.43
         52 |          2        0.16       98.58
         53 |         17        1.34       99.92
         99 |          1        0.08      100.00
------------+-----------------------------------
      Total |      1,272      100.00

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