Frequencies for first 10,000 rows of comstat24 variable in namcs2014 dataset :

Composition status |
          code for |
    medication #24 |      Freq.     Percent        Cum.
-------------------+-----------------------------------
Single entity drug |         23        0.23        0.23
  Combination drug |          2        0.02        0.25
      Undetermined |          2        0.02        0.27
                 . |      9,973       99.73      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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