Frequencies for first 10,000 rows of typeofmedicarehealthplan variable in planreport2009 dataset :

       Type of |
      Medicare |
   Health Plan |      Freq.     Percent        Cum.
---------------+-----------------------------------
               |      4,702       47.02       47.02
        Demo * |         10        0.10       47.12
     Local HMO |        943        9.43       56.55
   Local HMO * |        361        3.61       60.16
     Local PPO |      1,048       10.48       70.64
         MSA * |         50        0.50       71.14
          PFFS |      1,006       10.06       81.20
        PFFS * |        936        9.36       90.56
  Regional PPO |        472        4.72       95.28
Regional PPO * |        472        4.72      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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