Frequencies for first 10,000 rows of rx4v3c4 variable in nhamcsopd2009 dataset :

   for rx4, |
 level 3 of |
multum drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,990       99.90       99.90
        205 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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