Frequencies for first 10,000 rows of comstat6 variable in nhamcsed2015 dataset 

Composition status |
          code for |
     medication #6 |      Freq.     Percent        Cum.
-------------------+-----------------------------------
Single entity drug |        865        8.65        8.65
  Combination drug |        117        1.17        9.82
      Undetermined |          8        0.08        9.90
                 . |      9,010       90.10      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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