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

     DRIVER |
   DRINKING |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,928       79.28       79.28
          1 |      2,072       20.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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