Frequencies for first 10,000 rows of comstat14 variable in namcs2014 dataset :

Composition status |
          code for |
    medication #14 |      Freq.     Percent        Cum.
-------------------+-----------------------------------
Single entity drug |        309        3.09        3.09
  Combination drug |         27        0.27        3.36
      Undetermined |         12        0.12        3.48
                 . |      9,652       96.52      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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