Frequencies for first 10,000 rows of rx12v1c3 variable in nhamcsed2013 dataset :

  For RX12, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,998       99.98       99.98
        057 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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