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

 TRAFFICWAY |
       FLOW |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,378       53.78       53.78
          2 |      2,874       28.74       82.52
          3 |      1,018       10.18       92.70
          4 |         49        0.49       93.19
          5 |        412        4.12       97.31
          6 |        156        1.56       98.87
          9 |        113        1.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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