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

       Type of |
      Medicare |
   Health Plan |      Freq.     Percent        Cum.
---------------+-----------------------------------
          Cost |        132        1.32        1.32
        Cost * |        252        2.52        3.84
        Demo * |         14        0.14        3.98
     Local HMO |      1,059       10.59       14.57
   Local HMO * |        221        2.21       16.78
     Local PPO |        205        2.05       18.83
         MSA * |        303        3.03       21.86
          PFFS |      3,598       35.98       57.84
        PFFS * |      3,146       31.46       89.30
  Regional PPO |        929        9.29       98.59
Regional PPO * |        141        1.41      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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