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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        853        8.53        8.53
          2 |          5        0.05        8.58
          3 |          8        0.08        8.66
          5 |         48        0.48        9.14
          7 |         14        0.14        9.28
          8 |      1,151       11.51       20.79
          9 |        160        1.60       22.39
         10 |         45        0.45       22.84
         11 |         18        0.18       23.02
         12 |      5,280       52.80       75.82
         13 |        286        2.86       78.68
         14 |        121        1.21       79.89
         15 |         20        0.20       80.09
         16 |          4        0.04       80.13
         17 |         29        0.29       80.42
         18 |         38        0.38       80.80
         19 |         13        0.13       80.93
         20 |          4        0.04       80.97
         21 |         19        0.19       81.16
         22 |         15        0.15       81.31
         23 |         53        0.53       81.84
         24 |        192        1.92       83.76
         25 |         75        0.75       84.51
         26 |         12        0.12       84.63
         27 |         54        0.54       85.17
         28 |          1        0.01       85.18
         29 |         31        0.31       85.49
         30 |        147        1.47       86.96
         31 |         83        0.83       87.79
         32 |         53        0.53       88.32
         33 |        248        2.48       90.80
         34 |         77        0.77       91.57
         35 |         93        0.93       92.50
         36 |         27        0.27       92.77
         37 |         70        0.70       93.47
         38 |         96        0.96       94.43
         39 |         27        0.27       94.70
         40 |          4        0.04       94.74
         41 |         32        0.32       95.06
         42 |        370        3.70       98.76
         43 |        123        1.23       99.99
         44 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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