Frequencies for first 10,000 rows of comstat3 variable in nhamcsed1996 dataset :

composition |
status code |
for drug #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,571       15.71       15.71
          2 |        275        2.75       18.46
          3 |         89        0.89       19.35
          . |      8,065       80.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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