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

      FIRST |
    HARMFUL |
      EVENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,218       12.18       12.18
          2 |          3        0.03       12.21
          3 |         21        0.21       12.42
          5 |         72        0.72       13.14
          6 |          1        0.01       13.15
          7 |         29        0.29       13.44
          8 |      1,433       14.33       27.77
          9 |        240        2.40       30.17
         10 |         41        0.41       30.58
         11 |         22        0.22       30.80
         12 |      3,753       37.53       68.33
         13 |        161        1.61       69.94
         14 |        131        1.31       71.25
         15 |         32        0.32       71.57
         16 |          3        0.03       71.60
         17 |         38        0.38       71.98
         18 |         44        0.44       72.42
         19 |         13        0.13       72.55
         20 |          4        0.04       72.59
         21 |         26        0.26       72.85
         22 |          7        0.07       72.92
         23 |         28        0.28       73.20
         24 |        249        2.49       75.69
         25 |        106        1.06       76.75
         26 |          8        0.08       76.83
         27 |        128        1.28       78.11
         28 |          6        0.06       78.17
         29 |         23        0.23       78.40
         30 |        182        1.82       80.22
         31 |         91        0.91       81.13
         32 |         99        0.99       82.12
         33 |        401        4.01       86.13
         34 |        131        1.31       87.44
         35 |        132        1.32       88.76
         36 |         30        0.30       89.06
         37 |         53        0.53       89.59
         38 |        140        1.40       90.99
         39 |         46        0.46       91.45
         40 |          4        0.04       91.49
         41 |         21        0.21       91.70
         42 |        639        6.39       98.09
         43 |        140        1.40       99.49
         44 |          3        0.03       99.52
         45 |          9        0.09       99.61
         46 |         13        0.13       99.74
         47 |          2        0.02       99.76
         48 |          3        0.03       99.79
         99 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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