Frequencies for dr_drink variable in vehicle dataset :

     DRIVER |
   DRINKING |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        162       22.63       22.63
          . |        554       77.37      100.00
------------+-----------------------------------
      Total |        716      100.00

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