Frequencies for first 10,000 rows of substab variable in nhamcsed2015 dataset :

       Does |
    patient |
      have: |
  Substance |
   abuse or |
 dependence |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,219       92.19       92.19
        Yes |        781        7.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017