Frequencies for first 10,000 rows of rx1cat4 variable in nhamcsed2010 dataset :

   For RX1, |
MULTUM drug |
category #4 |
     - most |
   detailed |
 level (can |
  be either |
 Level 1,2  |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,862       98.62       98.62
        205 |        135        1.35       99.97
        433 |          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