Frequencies for first 10,000 rows of alcfl variable in nhamcsed1993 dataset :

        was |
alcohol/dru |
  g related |
   imputed? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,425       94.25       94.25
          1 |        575        5.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016