Frequencies for first 10,000 rows of comstat1 variable in nhamcsed2000 dataset :

composition |
status code |
for drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,873       58.73       58.73
          2 |        970        9.70       68.43
          3 |        212        2.12       70.55
          . |      2,945       29.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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