Frequencies for first 10,000 rows of comstat2 variable in nhamcsed2001 dataset :

composition |
status code |
for drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,638       36.38       36.38
          2 |        583        5.83       42.21
          3 |        174        1.74       43.95
          . |      5,605       56.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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