Frequencies for first 10,000 rows of rx2v3c3 variable in nhamcsopd2007 dataset :

   for rx2, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,952       99.52       99.52
        185 |          5        0.05       99.57
        197 |         19        0.19       99.76
        203 |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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