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

     DRIVER |
   DRINKING |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,737       77.37       77.37
          1 |      2,263       22.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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