Frequencies for tra_cont variable in accident dataset :

    Traffic |
   Controls |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        390       79.75       79.75
          1 |          8        1.64       81.39
          2 |         18        3.68       85.07
          3 |         12        2.45       87.53
          4 |          2        0.41       87.93
          8 |          4        0.82       88.75
          9 |          1        0.20       88.96
         98 |         52       10.63       99.59
         99 |          2        0.41      100.00
------------+-----------------------------------
      Total |        489      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016