Frequencies for first 10,000 rows of comstat3 variable in nhamcsopd2001 dataset :

composition |
status code |
        for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,868       18.68       18.68
          2 |        221        2.21       20.89
          3 |        133        1.33       22.22
          . |      7,778       77.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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