Frequencies for first 10,000 rows of comstat4 variable in nhamcsopd1999 dataset :

composition |
status code |
        for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,069       10.69       10.69
          2 |        113        1.13       11.82
          3 |         31        0.31       12.13
          . |      8,787       87.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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