Frequencies for first 10,000 rows of rx7cat3 variable in nhamcsopd2008 dataset :

   for rx7, |
multum drug |
category #3 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,992       99.92       99.92
        197 |          3        0.03       99.95
        203 |          1        0.01       99.96
        265 |          3        0.03       99.99
        270 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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