Frequencies for harm_ev variable in accident dataset :

      First |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         34        6.95        6.95
          5 |          9        1.84        8.79
          8 |        201       41.10       49.90
          9 |         11        2.25       52.15
         11 |          2        0.41       52.56
         12 |        119       24.34       76.89
         14 |         18        3.68       80.57
         16 |          2        0.41       80.98
         17 |          3        0.61       81.60
         19 |          6        1.23       82.82
         20 |         12        2.45       85.28
         21 |          4        0.82       86.09
         22 |         15        3.07       89.16
         23 |          2        0.41       89.57
         24 |          5        1.02       90.59
         25 |          2        0.41       91.00
         26 |          4        0.82       91.82
         27 |         27        5.52       97.34
         28 |         10        2.04       99.39
         31 |          3        0.61      100.00
------------+-----------------------------------
      Total |        489      100.00

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