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

      First |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,091       10.91       10.91
          2 |          4        0.04       10.95
          3 |         43        0.43       11.38
          5 |        102        1.02       12.40
          6 |          2        0.02       12.42
          7 |         15        0.15       12.57
          8 |      1,934       19.34       31.91
          9 |        237        2.37       34.28
         10 |        157        1.57       35.85
         11 |         20        0.20       36.05
         12 |      3,528       35.28       71.33
         13 |         17        0.17       71.50
         14 |        184        1.84       73.34
         16 |         21        0.21       73.55
         17 |        137        1.37       74.92
         18 |         10        0.10       75.02
         19 |        208        2.08       77.10
         20 |        407        4.07       81.17
         21 |         62        0.62       81.79
         22 |        314        3.14       84.93
         23 |        113        1.13       86.06
         24 |        239        2.39       88.45
         25 |         39        0.39       88.84
         26 |         90        0.90       89.74
         27 |        519        5.19       94.93
         28 |        301        3.01       97.94
         29 |         61        0.61       98.55
         31 |        138        1.38       99.93
         99 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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