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

      First |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,162       11.62       11.62
          2 |          8        0.08       11.70
          3 |         25        0.25       11.95
          4 |          2        0.02       11.97
          5 |        108        1.08       13.05
          6 |          2        0.02       13.07
          7 |         14        0.14       13.21
          8 |      1,862       18.62       31.83
          9 |        229        2.29       34.12
         10 |        119        1.19       35.31
         11 |         16        0.16       35.47
         12 |      3,573       35.73       71.20
         13 |         41        0.41       71.61
         14 |        192        1.92       73.53
         16 |         25        0.25       73.78
         17 |        168        1.68       75.46
         18 |         16        0.16       75.62
         19 |        190        1.90       77.52
         20 |        361        3.61       81.13
         21 |         44        0.44       81.57
         22 |        359        3.59       85.16
         23 |        118        1.18       86.34
         24 |        248        2.48       88.82
         25 |         39        0.39       89.21
         26 |         60        0.60       89.81
         27 |        472        4.72       94.53
         28 |        321        3.21       97.74
         29 |         61        0.61       98.35
         30 |          2        0.02       98.37
         31 |        147        1.47       99.84
         99 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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