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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        897        8.97        8.97
          2 |          1        0.01        8.98
          3 |         16        0.16        9.14
          5 |         32        0.32        9.46
          6 |          1        0.01        9.47
          7 |         26        0.26        9.73
          8 |        988        9.88       19.61
          9 |        171        1.71       21.32
         10 |         29        0.29       21.61
         11 |         13        0.13       21.74
         12 |      5,415       54.15       75.89
         13 |         89        0.89       76.78
         14 |        121        1.21       77.99
         15 |         32        0.32       78.31
         16 |          8        0.08       78.39
         17 |         24        0.24       78.63
         18 |         35        0.35       78.98
         19 |          8        0.08       79.06
         20 |          8        0.08       79.14
         21 |         19        0.19       79.33
         22 |          2        0.02       79.35
         23 |         29        0.29       79.64
         24 |        169        1.69       81.33
         25 |         90        0.90       82.23
         26 |          7        0.07       82.30
         27 |         80        0.80       83.10
         29 |         19        0.19       83.29
         30 |        103        1.03       84.32
         31 |         29        0.29       84.61
         32 |         42        0.42       85.03
         33 |        387        3.87       88.90
         34 |        148        1.48       90.38
         35 |        132        1.32       91.70
         36 |         28        0.28       91.98
         37 |         39        0.39       92.37
         38 |         86        0.86       93.23
         39 |         23        0.23       93.46
         40 |          4        0.04       93.50
         41 |         32        0.32       93.82
         42 |        400        4.00       97.82
         43 |         80        0.80       98.62
         45 |          9        0.09       98.71
         46 |         13        0.13       98.84
         47 |          2        0.02       98.86
         48 |          1        0.01       98.87
         49 |          1        0.01       98.88
         50 |          2        0.02       98.90
         52 |         21        0.21       99.11
         53 |         19        0.19       99.30
         54 |          4        0.04       99.34
         55 |          5        0.05       99.39
         60 |          6        0.06       99.45
         99 |         55        0.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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