Frequencies for first 10,000 rows of comstat2 variable in nhamcsed1997 dataset :

composition |
status code |
for drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,284       32.84       32.84
          2 |        536        5.36       38.20
          3 |        152        1.52       39.72
          . |      6,028       60.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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