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

 TRAFFICWAY |
       FLOW |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,313       53.13       53.13
          2 |      3,018       30.18       83.31
          3 |        966        9.66       92.97
          4 |         53        0.53       93.50
          5 |        413        4.13       97.63
          6 |         88        0.88       98.51
          9 |        149        1.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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