Frequencies for first 10,000 rows of viol_chg variable in vehicle dataset :

 Violations |
    Charged |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,693       76.93       76.93
          1 |      1,397       13.97       90.90
          2 |        675        6.75       97.65
          9 |        235        2.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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