Frequencies for first 10,000 rows of comstat2 variable in nhamcsopd2001 dataset :

composition |
status code |
        for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,986       29.86       29.86
          2 |        343        3.43       33.29
          3 |        206        2.06       35.35
          . |      6,465       64.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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