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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        851        8.51        8.51
          2 |          1        0.01        8.52
          3 |          6        0.06        8.58
          5 |         45        0.45        9.03
          6 |          1        0.01        9.04
          7 |         21        0.21        9.25
          8 |        956        9.56       18.81
          9 |        181        1.81       20.62
         10 |         41        0.41       21.03
         11 |         18        0.18       21.21
         12 |      5,390       53.90       75.11
         13 |         91        0.91       76.02
         14 |        104        1.04       77.06
         15 |         29        0.29       77.35
         16 |          5        0.05       77.40
         17 |         25        0.25       77.65
         18 |         27        0.27       77.92
         19 |          3        0.03       77.95
         20 |          6        0.06       78.01
         21 |         16        0.16       78.17
         22 |          2        0.02       78.19
         23 |         18        0.18       78.37
         24 |        177        1.77       80.14
         25 |         96        0.96       81.10
         26 |         24        0.24       81.34
         27 |         98        0.98       82.32
         28 |          1        0.01       82.33
         29 |         29        0.29       82.62
         30 |         79        0.79       83.41
         31 |         38        0.38       83.79
         32 |         59        0.59       84.38
         33 |        409        4.09       88.47
         34 |        169        1.69       90.16
         35 |        135        1.35       91.51
         36 |         30        0.30       91.81
         37 |         34        0.34       92.15
         38 |         99        0.99       93.14
         39 |         39        0.39       93.53
         40 |          7        0.07       93.60
         41 |         27        0.27       93.87
         42 |        378        3.78       97.65
         43 |         75        0.75       98.40
         44 |          5        0.05       98.45
         45 |          8        0.08       98.53
         46 |         11        0.11       98.64
         47 |          1        0.01       98.65
         48 |          2        0.02       98.67
         50 |          2        0.02       98.69
         51 |          4        0.04       98.73
         52 |         29        0.29       99.02
         53 |         15        0.15       99.17
         54 |         25        0.25       99.42
         55 |          3        0.03       99.45
         99 |         55        0.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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