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

      First |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        917        9.17        9.17
          2 |          5        0.05        9.22
          3 |          5        0.05        9.27
          4 |          2        0.02        9.29
          5 |         69        0.69        9.98
          6 |          4        0.04       10.02
          7 |         13        0.13       10.15
          8 |      1,191       11.91       22.06
          9 |        166        1.66       23.72
         10 |         49        0.49       24.21
         11 |         10        0.10       24.31
         12 |      5,174       51.74       76.05
         13 |         69        0.69       76.74
         14 |        211        2.11       78.85
         15 |          8        0.08       78.93
         16 |          3        0.03       78.96
         17 |         48        0.48       79.44
         18 |         25        0.25       79.69
         19 |          5        0.05       79.74
         20 |          1        0.01       79.75
         21 |         33        0.33       80.08
         22 |         29        0.29       80.37
         23 |         49        0.49       80.86
         24 |        210        2.10       82.96
         25 |         71        0.71       83.67
         26 |         16        0.16       83.83
         27 |         56        0.56       84.39
         29 |         26        0.26       84.65
         30 |        150        1.50       86.15
         31 |         73        0.73       86.88
         32 |         71        0.71       87.59
         33 |        409        4.09       91.68
         34 |         73        0.73       92.41
         35 |        150        1.50       93.91
         36 |         34        0.34       94.25
         37 |         51        0.51       94.76
         38 |         73        0.73       95.49
         39 |         28        0.28       95.77
         40 |          7        0.07       95.84
         41 |         23        0.23       96.07
         42 |        282        2.82       98.89
         43 |        103        1.03       99.92
         44 |          5        0.05       99.97
         99 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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