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

      Drunk |
     Driver |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,161       81.61       81.61
          1 |      1,745       17.45       99.06
          9 |         94        0.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016