Frequencies for first 10,000 rows of rx1v3c3 variable in nhamcsopd2008 dataset :

   for rx1, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,890       98.90       98.90
        185 |         48        0.48       99.38
        197 |         30        0.30       99.68
        203 |         31        0.31       99.99
        204 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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