Frequencies for first 10,000 rows of comstat12 variable in nhamcsed2014 dataset :

Composition status |
          code for |
    medication #12 |      Freq.     Percent        Cum.
-------------------+-----------------------------------
Single entity drug |        111        1.11        1.11
  Combination drug |         10        0.10        1.21
                 . |      9,879       98.79      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017