Frequencies for benefittype variable in pdp2007 dataset :

    Benefit |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
      Basic |      1,477       52.17       52.17
   Enhanced |      1,354       47.83      100.00
------------+-----------------------------------
      Total |      2,831      100.00

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