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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        923        9.23        9.23
          3 |         10        0.10        9.33
          5 |         51        0.51        9.84
          7 |         12        0.12        9.96
          8 |      1,204       12.04       22.00
          9 |        174        1.74       23.74
         10 |         50        0.50       24.24
         11 |         20        0.20       24.44
         12 |      5,215       52.15       76.59
         13 |        257        2.57       79.16
         14 |        110        1.10       80.26
         15 |         17        0.17       80.43
         16 |          4        0.04       80.47
         17 |         25        0.25       80.72
         18 |         28        0.28       81.00
         19 |         16        0.16       81.16
         20 |          3        0.03       81.19
         21 |         15        0.15       81.34
         22 |         26        0.26       81.60
         23 |         40        0.40       82.00
         24 |        162        1.62       83.62
         25 |         61        0.61       84.23
         26 |         11        0.11       84.34
         27 |         75        0.75       85.09
         29 |         29        0.29       85.38
         30 |        144        1.44       86.82
         31 |         41        0.41       87.23
         32 |         59        0.59       87.82
         33 |        284        2.84       90.66
         34 |        111        1.11       91.77
         35 |        120        1.20       92.97
         36 |         25        0.25       93.22
         37 |         61        0.61       93.83
         38 |         90        0.90       94.73
         39 |         26        0.26       94.99
         40 |          3        0.03       95.02
         41 |         39        0.39       95.41
         42 |        335        3.35       98.76
         43 |        122        1.22       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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