Frequencies for first 10,000 rows of comstat2 variable in nhamcsed1993 dataset :

composition |
status code |
for drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,922       29.22       29.22
          2 |        504        5.04       34.26
          3 |        190        1.90       36.16
          . |      6,384       63.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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