Frequencies for first 10,000 rows of comstat3 variable in nhamcsopd1997 dataset :

composition |
status code |
        for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,604       16.04       16.04
          2 |        170        1.70       17.74
          3 |         63        0.63       18.37
          . |      8,163       81.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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