Frequencies for first 10,000 rows of rx7v3c4 variable in namcs2011 dataset :

   For RX7, |
 level 3 of |
MULTUM drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,997       99.97       99.97
        205 |          1        0.01       99.98
        445 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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