Frequencies for first 10,000 rows of plantype variable in plan2015 dataset :

  Plan Type |      Freq.     Percent        Cum.
------------+-----------------------------------
        EPO |        612        6.12        6.12
        HMO |      3,598       35.98       42.10
  Indemnity |         16        0.16       42.26
        POS |      1,118       11.18       53.44
        PPO |      4,656       46.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Dec 2017