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

       MOST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,591       15.91       15.91
          2 |         99        0.99       16.90
          3 |         42        0.42       17.32
          5 |         43        0.43       17.75
          6 |          2        0.02       17.77
          7 |         15        0.15       17.92
          8 |      1,017       10.17       28.09
          9 |        184        1.84       29.93
         10 |         39        0.39       30.32
         11 |         10        0.10       30.42
         12 |      5,295       52.95       83.37
         13 |         66        0.66       84.03
         14 |         79        0.79       84.82
         15 |         30        0.30       85.12
         16 |          8        0.08       85.20
         17 |         18        0.18       85.38
         18 |         24        0.24       85.62
         19 |         15        0.15       85.77
         20 |          1        0.01       85.78
         21 |         21        0.21       85.99
         22 |          3        0.03       86.02
         23 |         12        0.12       86.14
         24 |         49        0.49       86.63
         25 |         42        0.42       87.05
         26 |          7        0.07       87.12
         27 |         23        0.23       87.35
         28 |          2        0.02       87.37
         29 |         47        0.47       87.84
         30 |        118        1.18       89.02
         31 |         27        0.27       89.29
         32 |         22        0.22       89.51
         33 |         30        0.30       89.81
         34 |         36        0.36       90.17
         35 |         37        0.37       90.54
         36 |         17        0.17       90.71
         37 |         10        0.10       90.81
         38 |         32        0.32       91.13
         39 |         46        0.46       91.59
         40 |          2        0.02       91.61
         41 |          1        0.01       91.62
         42 |        558        5.58       97.20
         43 |         32        0.32       97.52
         44 |          1        0.01       97.53
         45 |          6        0.06       97.59
         46 |         16        0.16       97.75
         47 |          6        0.06       97.81
         48 |          2        0.02       97.83
         50 |          2        0.02       97.85
         52 |         21        0.21       98.06
         53 |          3        0.03       98.09
         54 |        129        1.29       99.38
         55 |          3        0.03       99.41
         60 |          3        0.03       99.44
         99 |         56        0.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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