Frequencies for first 10,000 rows of comstat3 variable in namcs1998 dataset :

composition |
status code |
        for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,629       16.29       16.29
          2 |        240        2.40       18.69
          3 |         62        0.62       19.31
          . |      8,069       80.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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