Frequencies for first 10,000 rows of comstat1 variable in nhamcsed1998 dataset :

composition |
status code |
for drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,832       58.32       58.32
          2 |        832        8.32       66.64
          3 |        195        1.95       68.59
          . |      3,141       31.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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