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

     Driver |
   Drinking |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,883       68.83       68.83
          1 |      3,117       31.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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