Frequencies for first 10,000 rows of comstat11 variable in namcs2014 dataset :

Composition status |
          code for |
    medication #11 |      Freq.     Percent        Cum.
-------------------+-----------------------------------
Single entity drug |        692        6.92        6.92
  Combination drug |         64        0.64        7.56
      Undetermined |         15        0.15        7.71
                 . |      9,229       92.29      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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