Frequencies for first 10,000 rows of rx1v1c3 variable in nhamcsed2012 dataset :

   For RX1, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,774       97.74       97.74
        040 |         13        0.13       97.87
        057 |        209        2.09       99.96
        113 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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