Frequencies for first 10,000 rows of rx3v1c3 variable in nhamcsed2013 dataset :

   For RX3, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,855       98.55       98.55
        040 |          7        0.07       98.62
        057 |        132        1.32       99.94
        097 |          3        0.03       99.97
        113 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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