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

    Traffic |
    Control |
     Device |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,915       79.15       79.15
          1 |         18        0.18       79.33
          2 |         62        0.62       79.95
          3 |        629        6.29       86.24
          4 |         21        0.21       86.45
          5 |         10        0.10       86.55
          6 |         12        0.12       86.67
          7 |          6        0.06       86.73
          8 |          3        0.03       86.76
          9 |         61        0.61       87.37
         20 |        760        7.60       94.97
         21 |         20        0.20       95.17
         28 |         49        0.49       95.66
         29 |          1        0.01       95.67
         30 |          2        0.02       95.69
         31 |          1        0.01       95.70
         38 |          1        0.01       95.71
         40 |        322        3.22       98.93
         50 |         10        0.10       99.03
         60 |          8        0.08       99.11
         61 |         12        0.12       99.23
         69 |         13        0.13       99.36
         70 |         16        0.16       99.52
         71 |          6        0.06       99.58
         72 |          1        0.01       99.59
         80 |          2        0.02       99.61
         98 |          2        0.02       99.63
         99 |         37        0.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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