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

    Traffic |
    Control |
     Device |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,704       77.04       77.04
          1 |         10        0.10       77.14
          2 |         78        0.78       77.92
          3 |        694        6.94       84.86
          4 |         34        0.34       85.20
          5 |         10        0.10       85.30
          6 |          8        0.08       85.38
          7 |          4        0.04       85.42
          8 |          2        0.02       85.44
          9 |         36        0.36       85.80
         20 |        826        8.26       94.06
         21 |         32        0.32       94.38
         28 |         31        0.31       94.69
         29 |          4        0.04       94.73
         30 |          4        0.04       94.77
         38 |          1        0.01       94.78
         40 |        412        4.12       98.90
         50 |         11        0.11       99.01
         60 |         10        0.10       99.11
         61 |         14        0.14       99.25
         62 |          6        0.06       99.31
         63 |          2        0.02       99.33
         69 |          7        0.07       99.40
         70 |         17        0.17       99.57
         71 |          4        0.04       99.61
         72 |          2        0.02       99.63
         98 |          4        0.04       99.67
         99 |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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