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

       MOST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,686       16.86       16.86
          2 |         75        0.75       17.61
          3 |         34        0.34       17.95
          4 |          1        0.01       17.96
          5 |         39        0.39       18.35
          6 |          2        0.02       18.37
          7 |         19        0.19       18.56
          8 |      1,036       10.36       28.92
          9 |        160        1.60       30.52
         10 |         42        0.42       30.94
         11 |         14        0.14       31.08
         12 |      5,228       52.28       83.36
         13 |        163        1.63       84.99
         14 |         71        0.71       85.70
         15 |         18        0.18       85.88
         16 |          6        0.06       85.94
         17 |         25        0.25       86.19
         18 |         12        0.12       86.31
         19 |         21        0.21       86.52
         20 |          1        0.01       86.53
         21 |         24        0.24       86.77
         22 |          6        0.06       86.83
         23 |         20        0.20       87.03
         24 |         77        0.77       87.80
         25 |         49        0.49       88.29
         26 |          4        0.04       88.33
         27 |         32        0.32       88.65
         28 |          1        0.01       88.66
         29 |         41        0.41       89.07
         30 |        133        1.33       90.40
         31 |         15        0.15       90.55
         32 |         34        0.34       90.89
         33 |         34        0.34       91.23
         34 |         25        0.25       91.48
         35 |         51        0.51       91.99
         36 |         16        0.16       92.15
         37 |         12        0.12       92.27
         38 |         47        0.47       92.74
         39 |         38        0.38       93.12
         40 |          2        0.02       93.14
         41 |          1        0.01       93.15
         42 |        584        5.84       98.99
         43 |         45        0.45       99.44
         45 |          7        0.07       99.51
         46 |         20        0.20       99.71
         47 |          9        0.09       99.80
         48 |          1        0.01       99.81
         49 |          1        0.01       99.82
         99 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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