Frequencies for first 10,000 rows of rx4cat4 variable in nhamcsed2012 dataset :

   For RX4, |
MULTUM drug |
category #4 |
     - most |
   detailed |
 level (can |
  be either |
 Level 1,2  |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,978       99.78       99.78
        205 |         21        0.21       99.99
        433 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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