Frequencies for first 10,000 rows of rx4v3c4 variable in namcs2013 dataset :

   For RX4, |
 level 3 of |
MULTUM drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,988       99.88       99.88
        205 |          8        0.08       99.96
        445 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017