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

  Substance |
      abuse |
educ/counse |
       ling |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,972       99.72       99.72
          1 |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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