Frequencies for first 10,000 rows of comstat3 variable in nhamcsed2000 dataset :

composition |
status code |
for drug #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,616       16.16       16.16
          2 |        291        2.91       19.07
          3 |        102        1.02       20.09
          . |      7,991       79.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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