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

      First |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,041       10.41       10.41
          3 |         33        0.33       10.74
          5 |        102        1.02       11.76
          6 |          2        0.02       11.78
          7 |         31        0.31       12.09
          8 |      1,807       18.07       30.16
          9 |        287        2.87       33.03
         10 |         58        0.58       33.61
         11 |         18        0.18       33.79
         12 |      3,677       36.77       70.56
         13 |        114        1.14       71.70
         14 |        197        1.97       73.67
         15 |         10        0.10       73.77
         16 |          4        0.04       73.81
         17 |         48        0.48       74.29
         18 |         38        0.38       74.67
         19 |         13        0.13       74.80
         20 |          2        0.02       74.82
         21 |         39        0.39       75.21
         22 |         31        0.31       75.52
         23 |         39        0.39       75.91
         24 |        249        2.49       78.40
         25 |         71        0.71       79.11
         26 |         13        0.13       79.24
         27 |         83        0.83       80.07
         28 |          2        0.02       80.09
         29 |         46        0.46       80.55
         30 |        270        2.70       83.25
         31 |         92        0.92       84.17
         32 |         57        0.57       84.74
         33 |        302        3.02       87.76
         34 |        126        1.26       89.02
         35 |        121        1.21       90.23
         36 |         47        0.47       90.70
         37 |         58        0.58       91.28
         38 |        106        1.06       92.34
         39 |         27        0.27       92.61
         40 |          7        0.07       92.68
         41 |         34        0.34       93.02
         42 |        537        5.37       98.39
         43 |        157        1.57       99.96
         99 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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