Frequencies for first 10,000 rows of rx4v3c3 variable in nhamcsed2012 dataset :

   For RX4, |
 level 3 of |
MULTUM drug |
category #3 |
  (detailed |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,954       99.54       99.54
        197 |         21        0.21       99.75
        203 |         19        0.19       99.94
        204 |          5        0.05       99.99
        374 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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