Frequencies for first 10,000 rows of rx1v2c3 variable in nhamcsopd2008 dataset :

   for rx1, |
 level 2 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,876       98.76       98.76
        064 |         32        0.32       99.08
        065 |         30        0.30       99.38
        101 |         48        0.48       99.86
        270 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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