Frequencies for first 10,000 rows of rx2v3c4 variable in namcs2012 dataset :

   For RX2, |
 level 3 of |
MULTUM drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,981       99.81       99.81
        205 |         16        0.16       99.97
        445 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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