Frequencies for first 10,000 rows of rx7v3c3 variable in nhamcsed2008 dataset :

   for rx7, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,993       99.93       99.93
        197 |          4        0.04       99.97
        203 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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