Frequencies for first 10,000 rows of comstat3 variable in nhamcsed2001 dataset :

composition |
status code |
for drug #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,860       18.60       18.60
          2 |        287        2.87       21.47
          3 |         92        0.92       22.39
          . |      7,761       77.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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