Frequencies for first 10,000 rows of comstat2 variable in nhamcsed1995 dataset :

composition |
status code |
for drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,977       29.77       29.77
          2 |        579        5.79       35.56
          3 |        132        1.32       36.88
          . |      6,312       63.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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