Frequencies for first 10,000 rows of plantype variable in planreport2013 dataset :

                      Plan Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |      4,337       43.37       43.37
                            HMO |      1,964       19.64       63.01
                         HMOPOS |         54        0.54       63.55
                      Local PPO |      1,131       11.31       74.86
Medicare Prescription Drug Plan |        424        4.24       79.10
                  National PACE |         54        0.54       79.64
                           PFFS |        496        4.96       84.60
                   Regional PPO |      1,540       15.40      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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