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

 TRAFFICWAY |
       FLOW |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,160       51.60       51.60
          2 |      2,360       23.60       75.20
          3 |      1,511       15.11       90.31
          4 |         39        0.39       90.70
          5 |        578        5.78       96.48
          6 |        180        1.80       98.28
          9 |        172        1.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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