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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        829        8.29        8.29
          2 |          2        0.02        8.31
          3 |          9        0.09        8.40
          5 |         45        0.45        8.85
          6 |          3        0.03        8.88
          7 |         19        0.19        9.07
          8 |      1,125       11.25       20.32
          9 |        155        1.55       21.87
         10 |         55        0.55       22.42
         11 |         27        0.27       22.69
         12 |      5,342       53.42       76.11
         13 |        237        2.37       78.48
         14 |        122        1.22       79.70
         15 |         18        0.18       79.88
         16 |          3        0.03       79.91
         17 |         24        0.24       80.15
         18 |         34        0.34       80.49
         19 |          9        0.09       80.58
         20 |         10        0.10       80.68
         21 |         21        0.21       80.89
         22 |          4        0.04       80.93
         23 |         32        0.32       81.25
         24 |        234        2.34       83.59
         25 |         81        0.81       84.40
         26 |          5        0.05       84.45
         27 |         76        0.76       85.21
         29 |         21        0.21       85.42
         30 |        117        1.17       86.59
         31 |         58        0.58       87.17
         32 |         65        0.65       87.82
         33 |        284        2.84       90.66
         34 |        107        1.07       91.73
         35 |         91        0.91       92.64
         36 |         33        0.33       92.97
         37 |         50        0.50       93.47
         38 |         96        0.96       94.43
         39 |         22        0.22       94.65
         40 |          2        0.02       94.67
         41 |         18        0.18       94.85
         42 |        374        3.74       98.59
         43 |        116        1.16       99.75
         45 |          6        0.06       99.81
         46 |          7        0.07       99.88
         47 |          1        0.01       99.89
         49 |          1        0.01       99.90
         99 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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