Frequencies for first 10,000 rows of comstat3 variable in nhamcsed1993 dataset :

composition |
status code |
for drug #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,328       13.28       13.28
          2 |        244        2.44       15.72
          3 |        114        1.14       16.86
          . |      8,314       83.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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