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

      First |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        889        8.89        8.89
          2 |          2        0.02        8.91
          3 |         11        0.11        9.02
          5 |         52        0.52        9.54
          6 |          1        0.01        9.55
          7 |          6        0.06        9.61
          8 |      1,295       12.95       22.56
          9 |        248        2.48       25.04
         10 |         18        0.18       25.22
         11 |         20        0.20       25.42
         12 |      5,103       51.03       76.45
         14 |         73        0.73       77.18
         15 |         48        0.48       77.66
         16 |          5        0.05       77.71
         17 |         16        0.16       77.87
         18 |         40        0.40       78.27
         19 |         14        0.14       78.41
         20 |          6        0.06       78.47
         21 |         16        0.16       78.63
         23 |         24        0.24       78.87
         24 |        169        1.69       80.56
         25 |         73        0.73       81.29
         26 |          3        0.03       81.32
         30 |        115        1.15       82.47
         31 |         73        0.73       83.20
         32 |         69        0.69       83.89
         33 |        331        3.31       87.20
         34 |        139        1.39       88.59
         35 |        158        1.58       90.17
         38 |        113        1.13       91.30
         39 |         28        0.28       91.58
         40 |          1        0.01       91.59
         41 |         27        0.27       91.86
         42 |        468        4.68       96.54
         43 |         85        0.85       97.39
         44 |          3        0.03       97.42
         45 |          4        0.04       97.46
         46 |         12        0.12       97.58
         48 |          4        0.04       97.62
         49 |          2        0.02       97.64
         50 |          1        0.01       97.65
         51 |          1        0.01       97.66
         52 |         29        0.29       97.95
         53 |         38        0.38       98.33
         54 |         17        0.17       98.50
         55 |          2        0.02       98.52
         58 |         19        0.19       98.71
         59 |        110        1.10       99.81
         99 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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