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

 TRAFFICWAY |
       FLOW |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,389       53.89       53.89
          2 |      2,711       27.11       81.00
          3 |      1,145       11.45       92.45
          4 |         46        0.46       92.91
          5 |        422        4.22       97.13
          6 |        191        1.91       99.04
          9 |         96        0.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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