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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        842        8.42        8.42
          2 |          1        0.01        8.43
          3 |          6        0.06        8.49
          5 |         52        0.52        9.01
          6 |          2        0.02        9.03
          7 |         17        0.17        9.20
          8 |      1,098       10.98       20.18
          9 |        166        1.66       21.84
         10 |         40        0.40       22.24
         11 |         23        0.23       22.47
         12 |      5,189       51.89       74.36
         13 |        277        2.77       77.13
         14 |         89        0.89       78.02
         15 |         26        0.26       78.28
         16 |          2        0.02       78.30
         17 |         33        0.33       78.63
         18 |          7        0.07       78.70
         19 |         11        0.11       78.81
         20 |          2        0.02       78.83
         21 |         20        0.20       79.03
         22 |          7        0.07       79.10
         23 |         32        0.32       79.42
         24 |        190        1.90       81.32
         25 |         68        0.68       82.00
         26 |          3        0.03       82.03
         27 |         79        0.79       82.82
         28 |          1        0.01       82.83
         29 |         30        0.30       83.13
         30 |        124        1.24       84.37
         31 |         84        0.84       85.21
         32 |         98        0.98       86.19
         33 |        309        3.09       89.28
         34 |        131        1.31       90.59
         35 |        109        1.09       91.68
         36 |         17        0.17       91.85
         37 |         51        0.51       92.36
         38 |        107        1.07       93.43
         39 |         18        0.18       93.61
         40 |          8        0.08       93.69
         41 |         32        0.32       94.01
         42 |        424        4.24       98.25
         43 |        116        1.16       99.41
         44 |          3        0.03       99.44
         45 |         12        0.12       99.56
         46 |          7        0.07       99.63
         48 |          7        0.07       99.70
         49 |          1        0.01       99.71
         99 |         29        0.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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