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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        868        8.68        8.68
          2 |          1        0.01        8.69
          3 |         12        0.12        8.81
          5 |         54        0.54        9.35
          6 |          1        0.01        9.36
          7 |         13        0.13        9.49
          8 |      1,231       12.31       21.80
          9 |        194        1.94       23.74
         10 |         63        0.63       24.37
         11 |         18        0.18       24.55
         12 |      5,132       51.32       75.87
         13 |        246        2.46       78.33
         14 |        123        1.23       79.56
         15 |         14        0.14       79.70
         16 |          7        0.07       79.77
         17 |         30        0.30       80.07
         18 |         50        0.50       80.57
         19 |         14        0.14       80.71
         20 |          8        0.08       80.79
         21 |         15        0.15       80.94
         22 |         16        0.16       81.10
         23 |         29        0.29       81.39
         24 |        197        1.97       83.36
         25 |         74        0.74       84.10
         26 |          6        0.06       84.16
         27 |         81        0.81       84.97
         28 |          1        0.01       84.98
         29 |         25        0.25       85.23
         30 |        141        1.41       86.64
         31 |         57        0.57       87.21
         32 |         56        0.56       87.77
         33 |        333        3.33       91.10
         34 |        100        1.00       92.10
         35 |        110        1.10       93.20
         36 |         29        0.29       93.49
         37 |         60        0.60       94.09
         38 |         71        0.71       94.80
         39 |         24        0.24       95.04
         40 |          2        0.02       95.06
         41 |         22        0.22       95.28
         42 |        368        3.68       98.96
         43 |         89        0.89       99.85
         44 |          4        0.04       99.89
         45 |          3        0.03       99.92
         46 |          6        0.06       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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