Frequencies for first 10,000 rows of typeofmedicarehealthplan variable in ma2012 dataset :

       Type of |
      Medicare |
   Health Plan |      Freq.     Percent        Cum.
---------------+-----------------------------------
               |      4,820       48.20       48.20
     Local HMO |      1,338       13.38       61.58
   Local HMO * |        410        4.10       65.68
     Local PPO |        965        9.65       75.33
   Local PPO * |          2        0.02       75.35
          PFFS |        605        6.05       81.40
        PFFS * |        456        4.56       85.96
  Regional PPO |        836        8.36       94.32
Regional PPO * |        568        5.68      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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