Frequencies for first 10,000 rows of rx4v3c4 variable in nhamcsed2011 dataset :

   For RX4, |
 level 3 of |
MULTUM drug |
category #4 |
  (detailed |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,964       99.64       99.64
        205 |         36        0.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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