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

    Traffic |
    Control |
     Device |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,669       76.69       76.69
          1 |         14        0.14       76.83
          2 |        103        1.03       77.86
          3 |        647        6.47       84.33
          4 |         45        0.45       84.78
          5 |         17        0.17       84.95
          6 |          9        0.09       85.04
          7 |          1        0.01       85.05
          8 |          8        0.08       85.13
          9 |         41        0.41       85.54
         20 |        807        8.07       93.61
         21 |         13        0.13       93.74
         28 |         42        0.42       94.16
         29 |          3        0.03       94.19
         30 |          1        0.01       94.20
         31 |          1        0.01       94.21
         40 |        447        4.47       98.68
         50 |         12        0.12       98.80
         60 |         15        0.15       98.95
         61 |         28        0.28       99.23
         62 |          6        0.06       99.29
         69 |          8        0.08       99.37
         70 |         21        0.21       99.58
         71 |          5        0.05       99.63
         72 |          4        0.04       99.67
         73 |          1        0.01       99.68
         79 |          1        0.01       99.69
         98 |          2        0.02       99.71
         99 |         29        0.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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