Frequencies for first 10,000 rows of comstat4 variable in nhamcsopd1992 dataset :

Composition |
status code |
        for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        645        6.45        6.45
          2 |         84        0.84        7.29
          3 |         68        0.68        7.97
          . |      9,203       92.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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