Frequencies for first 10,000 rows of rx1cat4 variable in namcs2010 dataset :

   for rx1, |
multum drug |
category #4 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,971       99.71       99.71
        205 |         24        0.24       99.95
        445 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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