Frequencies for first 10,000 rows of rx4cat3 variable in nhamcsopd2007 dataset :

   for rx4, |
multum drug |
category #3 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,953       99.53       99.53
        185 |          3        0.03       99.56
        197 |         16        0.16       99.72
        203 |         22        0.22       99.94
        265 |          2        0.02       99.96
        270 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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