Frequencies for first 10,000 rows of comstat3 variable in nhamcsopd2000 dataset :

composition |
status code |
        for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,875       18.75       18.75
          2 |        197        1.97       20.72
          3 |         71        0.71       21.43
          . |      7,857       78.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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