Frequencies for dr_drink variable in vehicle dataset :

     DRIVER |
   DRINKING |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        472       75.40       75.40
          1 |        154       24.60      100.00
------------+-----------------------------------
      Total |        626      100.00

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