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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        899        8.99        8.99
          2 |          2        0.02        9.01
          3 |          5        0.05        9.06
          5 |         42        0.42        9.48
          7 |         13        0.13        9.61
          8 |      1,182       11.82       21.43
          9 |        162        1.62       23.05
         10 |         48        0.48       23.53
         11 |         15        0.15       23.68
         12 |      5,382       53.82       77.50
         13 |        250        2.50       80.00
         14 |        114        1.14       81.14
         15 |         11        0.11       81.25
         16 |          6        0.06       81.31
         17 |         38        0.38       81.69
         18 |         31        0.31       82.00
         19 |         12        0.12       82.12
         20 |          5        0.05       82.17
         21 |         15        0.15       82.32
         22 |         11        0.11       82.43
         23 |         32        0.32       82.75
         24 |        169        1.69       84.44
         25 |         40        0.40       84.84
         26 |          5        0.05       84.89
         27 |         72        0.72       85.61
         29 |         22        0.22       85.83
         30 |        122        1.22       87.05
         31 |         47        0.47       87.52
         32 |         75        0.75       88.27
         33 |        298        2.98       91.25
         34 |         79        0.79       92.04
         35 |         82        0.82       92.86
         36 |         19        0.19       93.05
         37 |         48        0.48       93.53
         38 |         91        0.91       94.44
         39 |         25        0.25       94.69
         40 |          4        0.04       94.73
         41 |         27        0.27       95.00
         42 |        346        3.46       98.46
         43 |        127        1.27       99.73
         45 |         11        0.11       99.84
         46 |          7        0.07       99.91
         99 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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