Frequencies for first 10,000 rows of rx1v3c3 variable in nhamcsopd2007 dataset :

   for rx1, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,913       99.13       99.13
        185 |         41        0.41       99.54
        197 |         25        0.25       99.79
        203 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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