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

      First |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        775        7.75        7.75
          2 |          4        0.04        7.79
          3 |          9        0.09        7.88
          5 |         46        0.46        8.34
          6 |          3        0.03        8.37
          7 |          7        0.07        8.44
          8 |      1,251       12.51       20.95
          9 |        196        1.96       22.91
         10 |         23        0.23       23.14
         11 |         30        0.30       23.44
         12 |      5,216       52.16       75.60
         14 |        101        1.01       76.61
         15 |         50        0.50       77.11
         16 |          3        0.03       77.14
         17 |         24        0.24       77.38
         18 |         39        0.39       77.77
         19 |          6        0.06       77.83
         20 |          8        0.08       77.91
         21 |         17        0.17       78.08
         23 |         21        0.21       78.29
         24 |        191        1.91       80.20
         25 |         87        0.87       81.07
         26 |          3        0.03       81.10
         30 |        151        1.51       82.61
         31 |         74        0.74       83.35
         32 |         65        0.65       84.00
         33 |        358        3.58       87.58
         34 |        193        1.93       89.51
         35 |        140        1.40       90.91
         38 |        104        1.04       91.95
         39 |         59        0.59       92.54
         40 |          3        0.03       92.57
         41 |         27        0.27       92.84
         42 |        414        4.14       96.98
         43 |         51        0.51       97.49
         44 |          7        0.07       97.56
         45 |          2        0.02       97.58
         46 |          7        0.07       97.65
         48 |          3        0.03       97.68
         49 |          1        0.01       97.69
         50 |          4        0.04       97.73
         51 |          1        0.01       97.74
         52 |         20        0.20       97.94
         53 |         52        0.52       98.46
         54 |          8        0.08       98.54
         57 |          5        0.05       98.59
         58 |         26        0.26       98.85
         59 |         81        0.81       99.66
         72 |          2        0.02       99.68
         99 |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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