Frequencies for alc_status variable in person dataset :

    ALCOHOL |
TEST STATUS |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        299       36.64       36.64
          2 |        517       63.36      100.00
------------+-----------------------------------
      Total |        816      100.00

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