Frequencies for first 10,000 rows of comstat2 variable in nhamcsed1994 dataset :

composition |
status code |
for drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,965       29.65       29.65
          2 |        578        5.78       35.43
          3 |        235        2.35       37.78
          . |      6,222       62.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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