Frequencies for first 10,000 rows of plantype variable in ma2013 dataset :

                      Plan Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |      5,552       55.52       55.52
                      1876 Cost |          8        0.08       55.60
                            HMO |      2,128       21.28       76.88
                         HMOPOS |         26        0.26       77.14
                      Local PPO |        622        6.22       83.36
Medicare Prescription Drug Plan |        360        3.60       86.96
     Medicare-Medicaid Plan HMO |         19        0.19       87.15
                  National PACE |         86        0.86       88.01
                           PFFS |        283        2.83       90.84
                   Regional PPO |        916        9.16      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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