Frequencies for first 10,000 rows of comstat3 variable in nhamcsed1995 dataset :

composition |
status code |
for drug #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,390       13.90       13.90
          2 |        242        2.42       16.32
          3 |         77        0.77       17.09
          . |      8,291       82.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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