Frequencies for dr_drink variable in vehicle dataset :

     DRIVER |
   DRINKING |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        576       75.39       75.39
          1 |        188       24.61      100.00
------------+-----------------------------------
      Total |        764      100.00

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