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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        926        9.26        9.26
          2 |          1        0.01        9.27
          3 |          5        0.05        9.32
          5 |         34        0.34        9.66
          7 |         33        0.33        9.99
          8 |      1,069       10.69       20.68
          9 |        180        1.80       22.48
         10 |         19        0.19       22.67
         11 |         29        0.29       22.96
         12 |      5,172       51.72       74.68
         13 |         75        0.75       75.43
         14 |         83        0.83       76.26
         15 |         40        0.40       76.66
         16 |          2        0.02       76.68
         17 |         36        0.36       77.04
         18 |         40        0.40       77.44
         19 |         12        0.12       77.56
         20 |         12        0.12       77.68
         21 |         17        0.17       77.85
         22 |          5        0.05       77.90
         23 |         26        0.26       78.16
         24 |        162        1.62       79.78
         25 |         97        0.97       80.75
         26 |          6        0.06       80.81
         27 |        103        1.03       81.84
         28 |          2        0.02       81.86
         29 |         20        0.20       82.06
         30 |        114        1.14       83.20
         31 |         60        0.60       83.80
         32 |         64        0.64       84.44
         33 |        413        4.13       88.57
         34 |        169        1.69       90.26
         35 |        127        1.27       91.53
         36 |         18        0.18       91.71
         37 |         32        0.32       92.03
         38 |        120        1.20       93.23
         39 |         37        0.37       93.60
         40 |          6        0.06       93.66
         41 |         15        0.15       93.81
         42 |        425        4.25       98.06
         43 |         62        0.62       98.68
         44 |          4        0.04       98.72
         45 |          5        0.05       98.77
         46 |         17        0.17       98.94
         47 |          2        0.02       98.96
         48 |          8        0.08       99.04
         49 |          3        0.03       99.07
         50 |          1        0.01       99.08
         51 |          1        0.01       99.09
         52 |         26        0.26       99.35
         53 |         41        0.41       99.76
         54 |         12        0.12       99.88
         60 |          1        0.01       99.89
         99 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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