Frequencies for first 10,000 rows of substab variable in namcs2015 dataset :

       Does |
patient now |
      have: |
  Substance |
   abuse or |
 dependence |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,823       98.23       98.23
          1 |        177        1.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2017