Frequencies for first 10,000 rows of comstat2 variable in nhamcsed1996 dataset :

composition |
status code |
for drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,170       31.70       31.70
          2 |        557        5.57       37.27
          3 |        159        1.59       38.86
          . |      6,114       61.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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