Frequencies for first 10,000 rows of plantype variable in planreport2018 dataset :

                      Plan Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |      4,249       42.49       42.49
                            HMO |      2,731       27.31       69.80
                         HMOPOS |        438        4.38       74.18
                      Local PPO |        972        9.72       83.90
Medicare Prescription Drug Plan |        226        2.26       86.16
     Medicare-Medicaid Plan HMO |         17        0.17       86.33
                  National PACE |        106        1.06       87.39
                           PFFS |        181        1.81       89.20
                   Regional PPO |      1,080       10.80      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

by Jean Roth , jroth@nber.org ,