Frequencies for drugbenefittype variable in snp2010 dataset :

       Drug |
    Benefit |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
      Basic |      4,257       48.81       48.81
   Enhanced |      4,465       51.19      100.00
------------+-----------------------------------
      Total |      8,722      100.00

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