Frequencies for first 10,000 rows of comstat4 variable in nhamcsopd2001 dataset :

composition |
status code |
        for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,304       13.04       13.04
          2 |        124        1.24       14.28
          3 |         71        0.71       14.99
          . |      8,501       85.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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