Frequencies for first 10,000 rows of typeofextracoverageinthega variable in planreport2007 dataset :

Type of Extra Coverage in the |
                          Gap |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                              |      7,111       71.11       71.11
          All Formulary Drugs |         85        0.85       71.96
                     Generics |      1,715       17.15       89.11
          Generics and Brands |      1,021       10.21       99.32
Generics and Preferred Brands |         68        0.68      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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