Frequencies for first 10,000 rows of rx9v3c4 variable in nhamcsed2012 dataset :

   For RX9, |
 level 3 of |
MULTUM drug |
category #4 |
  (detailed |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,998       99.98       99.98
        205 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016