Frequencies for first 10,000 rows of rx1v1c3 variable in nhamcsed2013 dataset :

   For RX1, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,701       97.01       97.01
        040 |         16        0.16       97.17
        057 |        281        2.81       99.98
        113 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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