Frequencies for first 10,000 rows of comstat2 variable in nhamcsopd1999 dataset :

composition |
status code |
        for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,110       31.10       31.10
          2 |        440        4.40       35.50
          3 |        157        1.57       37.07
          . |      6,293       62.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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