Frequencies for first 10,000 rows of rx4v3c3 variable in namcs2011 dataset :

   For RX4, |
 level 3 of |
MULTUM drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,975       99.75       99.75
        185 |          4        0.04       99.79
        197 |          8        0.08       99.87
        203 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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