Frequencies for first 10,000 rows of rx4v3c3 variable in nhamcsed2011 dataset :

   For RX4, |
 level 3 of |
MULTUM drug |
category #3 |
  (detailed |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,948       99.48       99.48
        197 |         36        0.36       99.84
        203 |         15        0.15       99.99
        204 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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