Frequencies for first 10,000 rows of plantype variable in planreport2012 dataset :

                      Plan Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |      4,472       44.72       44.72
                            HMO |      2,078       20.78       65.50
                         HMOPOS |         96        0.96       66.46
                      Local PPO |      1,057       10.57       77.03
Medicare Prescription Drug Plan |        450        4.50       81.53
                  National PACE |         44        0.44       81.97
                           PFFS |        493        4.93       86.90
                   Regional PPO |      1,310       13.10      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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