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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        912        9.12        9.12
          2 |          4        0.04        9.16
          3 |          5        0.05        9.21
          4 |          1        0.01        9.22
          5 |         40        0.40        9.62
          7 |         21        0.21        9.83
          8 |      1,140       11.40       21.23
          9 |        173        1.73       22.96
         10 |         44        0.44       23.40
         11 |         26        0.26       23.66
         12 |      5,117       51.17       74.83
         13 |        341        3.41       78.24
         14 |        113        1.13       79.37
         15 |         17        0.17       79.54
         16 |          5        0.05       79.59
         17 |         31        0.31       79.90
         18 |         25        0.25       80.15
         19 |          5        0.05       80.20
         20 |          8        0.08       80.28
         21 |         25        0.25       80.53
         22 |          5        0.05       80.58
         23 |         41        0.41       80.99
         24 |        177        1.77       82.76
         25 |         81        0.81       83.57
         26 |          1        0.01       83.58
         27 |         81        0.81       84.39
         29 |         19        0.19       84.58
         30 |        118        1.18       85.76
         31 |         69        0.69       86.45
         32 |         71        0.71       87.16
         33 |        373        3.73       90.89
         34 |         94        0.94       91.83
         35 |        100        1.00       92.83
         36 |         29        0.29       93.12
         37 |         63        0.63       93.75
         38 |         89        0.89       94.64
         39 |         18        0.18       94.82
         40 |          4        0.04       94.86
         41 |         39        0.39       95.25
         42 |        326        3.26       98.51
         43 |         98        0.98       99.49
         45 |          2        0.02       99.51
         46 |         10        0.10       99.61
         99 |         39        0.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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