Frequencies for first 10,000 rows of rx3v1c3 variable in nhamcsed2012 dataset :

   For RX3, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,901       99.01       99.01
        040 |         13        0.13       99.14
        057 |         79        0.79       99.93
        097 |          3        0.03       99.96
        113 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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