Frequencies for drugbenefittype variable in snp2013 dataset :

       Drug |
    Benefit |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
      Basic |      7,138       60.07       60.08
   Enhanced |      4,743       39.92      100.00
------------+-----------------------------------
      Total |     11,882      100.00

by Jean Roth , jroth@nber.org , 14 Apr 2016