Frequencies for benefittype variable in pdp2011 dataset :

    Benefit |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
      Basic |        829       57.17       57.17
   Enhanced |        621       42.83      100.00
------------+-----------------------------------
      Total |      1,450      100.00

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