Frequencies for first 10,000 rows of comstat1 variable in nhamcsed1996 dataset :

composition |
status code |
for drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,709       57.09       57.09
          2 |      1,037       10.37       67.46
          3 |        251        2.51       69.97
          . |      3,003       30.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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