Frequencies for first 10,000 rows of comstat1 variable in nhamcsopd1993 dataset :

composition |
status code |
        for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,187       41.87       41.87
          2 |        988        9.88       51.75
          3 |        469        4.69       56.44
          . |      4,356       43.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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