Frequencies for first 10,000 rows of rx4cat4 variable in nhamcsopd2007 dataset :

   for rx4, |
multum drug |
category #4 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,984       99.84       99.84
        205 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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