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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        813        8.13        8.13
          2 |          6        0.06        8.19
          3 |         13        0.13        8.32
          5 |         57        0.57        8.89
          6 |          3        0.03        8.92
          7 |          9        0.09        9.01
          8 |      1,160       11.60       20.61
          9 |        193        1.93       22.54
         10 |         43        0.43       22.97
         11 |         21        0.21       23.18
         12 |      5,284       52.84       76.02
         13 |        268        2.68       78.70
         14 |        101        1.01       79.71
         15 |         12        0.12       79.83
         16 |          3        0.03       79.86
         17 |         30        0.30       80.16
         18 |         30        0.30       80.46
         19 |          4        0.04       80.50
         20 |         12        0.12       80.62
         21 |         21        0.21       80.83
         22 |         12        0.12       80.95
         23 |         35        0.35       81.30
         24 |        186        1.86       83.16
         25 |         63        0.63       83.79
         26 |          6        0.06       83.85
         27 |         87        0.87       84.72
         29 |         23        0.23       84.95
         30 |        111        1.11       86.06
         31 |         59        0.59       86.65
         32 |         80        0.80       87.45
         33 |        348        3.48       90.93
         34 |        107        1.07       92.00
         35 |         92        0.92       92.92
         36 |         18        0.18       93.10
         37 |         64        0.64       93.74
         38 |         75        0.75       94.49
         39 |         22        0.22       94.71
         40 |          3        0.03       94.74
         41 |         24        0.24       94.98
         42 |        343        3.43       98.41
         43 |        112        1.12       99.53
         45 |          4        0.04       99.57
         46 |         13        0.13       99.70
         99 |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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