Frequencies for first 10,000 rows of comstat8 variable in namcs2014 dataset :

Composition status |
          code for |
     medication #8 |      Freq.     Percent        Cum.
-------------------+-----------------------------------
Single entity drug |      1,331       13.31       13.31
  Combination drug |        111        1.11       14.42
      Undetermined |         45        0.45       14.87
                 . |      8,513       85.13      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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