Frequencies for first 10,000 rows of drugbenefittype variable in snp2009 dataset :

       Drug |
    Benefit |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
      Basic |      3,123       31.23       31.23
   Enhanced |      6,877       68.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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