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

      first |
    harmful |
      event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        807        8.07        8.07
          2 |          5        0.05        8.12
          3 |          7        0.07        8.19
          5 |         53        0.53        8.72
          7 |          7        0.07        8.79
          8 |      1,347       13.47       22.26
          9 |        275        2.75       25.01
         10 |         18        0.18       25.19
         11 |         22        0.22       25.41
         12 |      5,150       51.50       76.91
         14 |        106        1.06       77.97
         15 |         50        0.50       78.47
         16 |          1        0.01       78.48
         17 |         32        0.32       78.80
         18 |         35        0.35       79.15
         19 |          9        0.09       79.24
         20 |         13        0.13       79.37
         21 |         17        0.17       79.54
         23 |         16        0.16       79.70
         24 |        157        1.57       81.27
         25 |         88        0.88       82.15
         26 |          6        0.06       82.21
         30 |        148        1.48       83.69
         31 |         69        0.69       84.38
         32 |         62        0.62       85.00
         33 |        336        3.36       88.36
         34 |        113        1.13       89.49
         35 |        183        1.83       91.32
         38 |        102        1.02       92.34
         39 |         31        0.31       92.65
         40 |          6        0.06       92.71
         41 |         19        0.19       92.90
         42 |        435        4.35       97.25
         43 |         66        0.66       97.91
         45 |          6        0.06       97.97
         46 |          9        0.09       98.06
         48 |          2        0.02       98.08
         49 |          2        0.02       98.10
         50 |          1        0.01       98.11
         51 |          2        0.02       98.13
         52 |         36        0.36       98.49
         53 |         31        0.31       98.80
         54 |         13        0.13       98.93
         58 |         22        0.22       99.15
         59 |         70        0.70       99.85
         72 |          2        0.02       99.87
         73 |          2        0.02       99.89
         99 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016