Frequencies for first 10,000 rows of comstat3 variable in nhamcsed2002 dataset :

composition |
status code |
for drug #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,882       18.82       18.82
          2 |        242        2.42       21.24
          3 |         87        0.87       22.11
          . |      7,789       77.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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