Frequencies for first 10,000 rows of rx3v3c3 variable in nhamcsopd2009 dataset :

   for rx3, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,946       99.46       99.46
        185 |          7        0.07       99.53
        197 |         19        0.19       99.72
        203 |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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