Frequencies for first 10,000 rows of comstat3 variable in nhamcsed1998 dataset :

composition |
status code |
for drug #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,488       14.88       14.88
          2 |        197        1.97       16.85
          3 |         63        0.63       17.48
          . |      8,252       82.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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