Frequencies for first 10,000 rows of typeofmedicarehealthplan variable in ma2010 dataset :

       Type of |
      Medicare |
   Health Plan |      Freq.     Percent        Cum.
---------------+-----------------------------------
               |      4,473       44.73       44.73
        Demo * |          5        0.05       44.78
     Local HMO |      1,302       13.02       57.80
   Local HMO * |        382        3.82       61.62
     Local PPO |        993        9.93       71.55
   Local PPO * |          2        0.02       71.57
          PFFS |        875        8.75       80.32
        PFFS * |        700        7.00       87.32
  Regional PPO |        700        7.00       94.32
Regional PPO * |        568        5.68      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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