Frequencies for first 10,000 rows of comstat1 variable in nhamcsopd1997 dataset :

composition |
status code |
        for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,479       44.79       44.79
          2 |      1,151       11.51       56.30
          3 |        250        2.50       58.80
          . |      4,120       41.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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