Frequencies for first 10,000 rows of rx4cat4 variable in namcs2012 dataset :

   For RX4, |
MULTUM drug |
category #4 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,990       99.90       99.90
        205 |          8        0.08       99.98
        445 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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