Frequencies for first 10,000 rows of drugbenefittype variable in ma2007 dataset :

       Drug |
    Benefit |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,077       40.77       40.77
      Basic |      1,831       18.31       59.08
   Enhanced |      4,092       40.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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