Frequencies for first 10,000 rows of typeofmedicarehealthplan variable in man_to_w2019 dataset :

       Type of |
      Medicare |
   Health Plan |      Freq.     Percent        Cum.
---------------+-----------------------------------
               |          1        0.01        0.01
          Cost |        138        1.38        1.39
        Cost * |        198        1.98        3.37
     Local HMO |      3,733       37.33       40.70
   Local HMO * |        689        6.89       47.59
     Local PPO |      3,037       30.37       77.96
   Local PPO * |        338        3.38       81.34
         MSA * |        230        2.30       83.64
          PFFS |        202        2.02       85.66
        PFFS * |        189        1.89       87.55
  Regional PPO |        793        7.93       95.48
Regional PPO * |        452        4.52      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019