Frequencies for first 10,000 rows of rx2v1c4 variable in namcs2011 dataset :

   For RX2, |
 level 1 of |
MULTUM drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,968       99.68       99.68
        057 |         28        0.28       99.96
        254 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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