Frequencies for dstatus variable in person dataset :

DRUG STATUS |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        496       60.78       60.78
          2 |        320       39.22      100.00
------------+-----------------------------------
      Total |        816      100.00

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