Frequencies for first 10,000 rows of rx3v1c4 variable in nhamcsed2011 dataset :

   For RX3, |
 level 1 of |
MULTUM drug |
category #4 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,947       99.47       99.47
        040 |          1        0.01       99.48
        057 |         51        0.51       99.99
        254 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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