Frequencies for first 10,000 rows of rx6cat4 variable in nhamcsopd2010 dataset :

   for rx6, |
multum drug |
category #4 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,993       99.93       99.93
        205 |          5        0.05       99.98
        433 |          1        0.01       99.99
        445 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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