Frequencies for violchg1 variable in vehicle dataset :

  VIOLATION |
   CHARGE 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        180       38.14       38.14
          4 |        248       52.54       90.68
          7 |         34        7.20       97.88
         19 |          3        0.64       98.52
         22 |          7        1.48      100.00
------------+-----------------------------------
      Total |        472      100.00

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