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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        892        8.92        8.92
          3 |          4        0.04        8.96
          4 |          1        0.01        8.97
          5 |         28        0.28        9.25
          6 |          1        0.01        9.26
          7 |         36        0.36        9.62
          8 |        973        9.73       19.35
          9 |        151        1.51       20.86
         10 |         22        0.22       21.08
         11 |         18        0.18       21.26
         12 |      5,357       53.57       74.83
         13 |        182        1.82       76.65
         14 |        122        1.22       77.87
         15 |         19        0.19       78.06
         16 |          7        0.07       78.13
         17 |         24        0.24       78.37
         18 |         40        0.40       78.77
         19 |          5        0.05       78.82
         20 |          8        0.08       78.90
         21 |         17        0.17       79.07
         22 |          4        0.04       79.11
         23 |         32        0.32       79.43
         24 |        176        1.76       81.19
         25 |         77        0.77       81.96
         26 |          3        0.03       81.99
         27 |         87        0.87       82.86
         29 |         31        0.31       83.17
         30 |         82        0.82       83.99
         31 |         29        0.29       84.28
         32 |         68        0.68       84.96
         33 |        419        4.19       89.15
         34 |        134        1.34       90.49
         35 |        121        1.21       91.70
         36 |         25        0.25       91.95
         37 |         36        0.36       92.31
         38 |         91        0.91       93.22
         39 |         39        0.39       93.61
         40 |          4        0.04       93.65
         41 |         26        0.26       93.91
         42 |        384        3.84       97.75
         43 |         89        0.89       98.64
         44 |          1        0.01       98.65
         45 |          6        0.06       98.71
         46 |         16        0.16       98.87
         47 |          1        0.01       98.88
         48 |          1        0.01       98.89
         50 |          3        0.03       98.92
         51 |          4        0.04       98.96
         52 |         31        0.31       99.27
         53 |         28        0.28       99.55
         54 |          4        0.04       99.59
         60 |          5        0.05       99.64
         99 |         36        0.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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