Frequencies for first 10,000 rows of typeofmedicarehealthplan variable in maa_to_m2009 dataset :

       Type of |
      Medicare |
   Health Plan |      Freq.     Percent        Cum.
---------------+-----------------------------------
          Cost |        189        1.89        1.89
        Cost * |        252        2.52        4.41
          Demo |          1        0.01        4.42
        Demo * |         22        0.22        4.64
     Local HMO |      1,180       11.80       16.44
   Local HMO * |        306        3.06       19.50
     Local PPO |        350        3.50       23.00
   Local PPO * |         35        0.35       23.35
         MSA * |        249        2.49       25.84
          PFFS |      3,443       34.43       60.27
        PFFS * |      3,414       34.14       94.41
  Regional PPO |        326        3.26       97.67
Regional PPO * |        233        2.33      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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