Frequencies for first 10,000 rows of substab variable in namcs2014 dataset :

       Does |
patient now |
      have: |
  Substance |
      abuse |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,725       97.25       97.25
        Yes |        275        2.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017