Frequencies for first 10,000 rows of comstat2 variable in namcs1997 dataset :

composition |
status code |
        for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,892       48.92       48.92
          2 |        752        7.52       56.44
          3 |        146        1.46       57.90
          . |      4,210       42.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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