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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        801        8.01        8.01
          2 |          1        0.01        8.02
          3 |          6        0.06        8.08
          5 |         53        0.53        8.61
          7 |         20        0.20        8.81
          8 |      1,152       11.52       20.33
          9 |        171        1.71       22.04
         10 |         33        0.33       22.37
         11 |         17        0.17       22.54
         12 |      5,305       53.05       75.59
         13 |        246        2.46       78.05
         14 |        102        1.02       79.07
         15 |         21        0.21       79.28
         16 |          3        0.03       79.31
         17 |         34        0.34       79.65
         18 |         34        0.34       79.99
         19 |          8        0.08       80.07
         20 |          2        0.02       80.09
         21 |         15        0.15       80.24
         22 |          5        0.05       80.29
         23 |         34        0.34       80.63
         24 |        213        2.13       82.76
         25 |         47        0.47       83.23
         26 |          5        0.05       83.28
         27 |         80        0.80       84.08
         28 |          2        0.02       84.10
         29 |         16        0.16       84.26
         30 |        121        1.21       85.47
         31 |         70        0.70       86.17
         32 |         73        0.73       86.90
         33 |        363        3.63       90.53
         34 |         95        0.95       91.48
         35 |         92        0.92       92.40
         36 |         23        0.23       92.63
         37 |         55        0.55       93.18
         38 |         89        0.89       94.07
         39 |         17        0.17       94.24
         40 |          1        0.01       94.25
         41 |         31        0.31       94.56
         42 |        370        3.70       98.26
         43 |        129        1.29       99.55
         44 |          2        0.02       99.57
         45 |          6        0.06       99.63
         46 |          7        0.07       99.70
         48 |          2        0.02       99.72
         99 |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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