Frequencies for first 10,000 rows of rx6v3c3 variable in nhamcsopd2009 dataset :

   for rx6, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,975       99.75       99.75
        185 |          3        0.03       99.78
        197 |          7        0.07       99.85
        203 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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