Frequencies for first 10,000 rows of comstat2 variable in namcs1994 dataset :

composition |
status code |
        for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,322       33.22       33.22
          2 |        723        7.23       40.45
          3 |        210        2.10       42.55
          . |      5,745       57.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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