Frequencies for first 10,000 rows of comstat28 variable in nhamcsed2014 dataset :

Composition status |
          code for |
    medication #28 |      Freq.     Percent        Cum.
-------------------+-----------------------------------
Single entity drug |          3        0.03        0.03
                 . |      9,997       99.97      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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