Frequencies for first 10,000 rows of comstat6 variable in nhamcsed1996 dataset :

composition |
status code |
for drug #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        223        2.23        2.23
          2 |         24        0.24        2.47
          3 |         15        0.15        2.62
          . |      9,738       97.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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