Frequencies for first 10,000 rows of plantype variable in planreporta_to_m2013 dataset :

                      Plan Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |          1        0.01        0.01
                      1876 Cost |        262        2.62        2.63
                            HMO |      3,239       32.39       35.02
                         HMOPOS |        444        4.44       39.46
                      Local PPO |      2,282       22.82       62.28
Medicare Prescription Drug Plan |        351        3.51       65.79
                  National PACE |         68        0.68       66.47
                           PFFS |      1,099       10.99       77.46
                   Regional PPO |      2,254       22.54      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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