Frequencies for first 10,000 rows of comstat14 variable in nhamcsed2014 dataset :

Composition status |
          code for |
    medication #14 |      Freq.     Percent        Cum.
-------------------+-----------------------------------
Single entity drug |         61        0.61        0.61
  Combination drug |          6        0.06        0.67
                 . |      9,933       99.33      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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