Frequencies for first 10,000 rows of comstat8 variable in namcs2011 dataset :

   Medication #8 - |
Composition status |
              code |      Freq.     Percent        Cum.
-------------------+-----------------------------------
Single entity drug |        889        8.89        8.89
  Combination drug |         79        0.79        9.68
      Undetermined |         10        0.10        9.78
                 . |      9,022       90.22      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016