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

    Roadway |
       Flow |      Freq.     Percent        Cum.
------------+-----------------------------------
          3 |      2,238       22.38       22.38
          4 |      7,488       74.88       97.26
          5 |        149        1.49       98.75
          9 |        125        1.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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