Frequencies for first 10,000 rows of rx4cat4 variable in nhamcsed2009 dataset :

   for rx4, |
multum drug |
category #4 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,968       99.68       99.68
        205 |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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