Frequencies for first 10,000 rows of rx7v2c4 variable in nhamcsed2007 dataset :

   for rx7, |
 level 2 of |
multum drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,997       99.97       99.97
        066 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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