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

    Traffic |
    Control |
     Device |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,456       74.56       74.56
          1 |         12        0.12       74.68
          2 |         97        0.97       75.65
          3 |        738        7.38       83.03
          4 |         20        0.20       83.23
          5 |         17        0.17       83.40
          6 |         12        0.12       83.52
          7 |          2        0.02       83.54
          8 |          7        0.07       83.61
          9 |          4        0.04       83.65
         20 |        815        8.15       91.80
         21 |         15        0.15       91.95
         28 |         21        0.21       92.16
         29 |          1        0.01       92.17
         30 |          2        0.02       92.19
         40 |        652        6.52       98.71
         50 |         13        0.13       98.84
         60 |         27        0.27       99.11
         61 |         25        0.25       99.36
         62 |          7        0.07       99.43
         63 |          1        0.01       99.44
         69 |          2        0.02       99.46
         70 |         21        0.21       99.67
         71 |          6        0.06       99.73
         79 |          1        0.01       99.74
         80 |          2        0.02       99.76
         99 |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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