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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,244       12.44       12.44
          2 |          1        0.01       12.45
          3 |         11        0.11       12.56
          5 |         55        0.55       13.11
          7 |         25        0.25       13.36
          8 |      1,451       14.51       27.87
          9 |        277        2.77       30.64
         10 |         38        0.38       31.02
         11 |         22        0.22       31.24
         12 |      3,609       36.09       67.33
         13 |         88        0.88       68.21
         14 |        126        1.26       69.47
         15 |         39        0.39       69.86
         16 |          2        0.02       69.88
         17 |         43        0.43       70.31
         18 |         47        0.47       70.78
         19 |          8        0.08       70.86
         20 |          9        0.09       70.95
         21 |         21        0.21       71.16
         22 |          4        0.04       71.20
         23 |         22        0.22       71.42
         24 |        237        2.37       73.79
         25 |         96        0.96       74.75
         26 |          7        0.07       74.82
         27 |        153        1.53       76.35
         28 |          2        0.02       76.37
         29 |         31        0.31       76.68
         30 |        193        1.93       78.61
         31 |         72        0.72       79.33
         32 |         82        0.82       80.15
         33 |        497        4.97       85.12
         34 |        226        2.26       87.38
         35 |        169        1.69       89.07
         36 |         27        0.27       89.34
         37 |         36        0.36       89.70
         38 |        153        1.53       91.23
         39 |         51        0.51       91.74
         40 |          6        0.06       91.80
         41 |         32        0.32       92.12
         42 |        580        5.80       97.92
         43 |         70        0.70       98.62
         44 |          6        0.06       98.68
         45 |          2        0.02       98.70
         46 |         13        0.13       98.83
         47 |          1        0.01       98.84
         48 |          5        0.05       98.89
         50 |          1        0.01       98.90
         51 |          3        0.03       98.93
         52 |         25        0.25       99.18
         53 |         51        0.51       99.69
         54 |          6        0.06       99.75
         55 |          1        0.01       99.76
         60 |          5        0.05       99.81
         99 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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