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

       Most |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,490       14.90       14.90
          2 |        119        1.19       16.09
          3 |         45        0.45       16.54
          5 |         62        0.62       17.16
          6 |          1        0.01       17.17
          7 |          1        0.01       17.18
          8 |        977        9.77       26.95
          9 |        130        1.30       28.25
         10 |         77        0.77       29.02
         11 |         11        0.11       29.13
         12 |      5,418       54.18       83.31
         13 |         65        0.65       83.96
         14 |        159        1.59       85.55
         15 |         13        0.13       85.68
         16 |         14        0.14       85.82
         18 |         32        0.32       86.14
         19 |         76        0.76       86.90
         20 |         67        0.67       87.57
         21 |         24        0.24       87.81
         22 |        135        1.35       89.16
         23 |         40        0.40       89.56
         24 |         97        0.97       90.53
         25 |         29        0.29       90.82
         26 |         16        0.16       90.98
         27 |        413        4.13       95.11
         28 |        314        3.14       98.25
         29 |         30        0.30       98.55
         31 |         57        0.57       99.12
         32 |         34        0.34       99.46
         33 |         36        0.36       99.82
         99 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016