Frequencies for first 10,000 rows of comstat3 variable in namcs1995 dataset :

composition |
status code |
        for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,881       18.81       18.81
          2 |        279        2.79       21.60
          3 |         68        0.68       22.28
          . |      7,772       77.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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