Frequencies for first 10,000 rows of rx2v3c3 variable in nhamcsed2009 dataset :

   for rx2, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,832       98.32       98.32
        197 |         86        0.86       99.18
        203 |         76        0.76       99.94
        204 |          5        0.05       99.99
        374 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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