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

      Drunk |
     Driver |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,588       85.88       85.88
          1 |      1,369       13.69       99.57
          9 |         43        0.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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