Frequencies for first 10,000 rows of rx3v3c3 variable in nhamcsed2009 dataset :

   for rx3, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,917       99.17       99.17
        197 |         34        0.34       99.51
        203 |         45        0.45       99.96
        204 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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