Frequencies for first 10,000 rows of rx2v3c4 variable in nhamcsopd2009 dataset :

   for rx2, |
 level 3 of |
multum drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,980       99.80       99.80
        205 |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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