Frequencies for first 10,000 rows of rx6v2c4 variable in nhamcsopd2010 dataset :

   for rx6, |
 level 2 of |
multum drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,993       99.93       99.93
        066 |          5        0.05       99.98
        104 |          1        0.01       99.99
        433 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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