Frequencies for first 10,000 rows of rx7v3c4 variable in nhamcsed2008 dataset :

   for rx7, |
 level 3 of |
multum drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,996       99.96       99.96
        205 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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