Frequencies for first 10,000 rows of rx2v1c4 variable in nhamcsed2012 dataset :

   For RX2, |
 level 1 of |
MULTUM drug |
category #4 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,919       99.19       99.19
        057 |         81        0.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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