Frequencies for first 10,000 rows of comstat2 variable in nhamcsed2002 dataset :

composition |
status code |
for drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,599       35.99       35.99
          2 |        471        4.71       40.70
          3 |        166        1.66       42.36
          . |      5,764       57.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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