Frequencies for first 10,000 rows of typeofextracoverageinthega variable in ma2012 dataset :

Type of Extra Coverage in the |
                          Gap |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                              |      9,024       90.24       90.24
  All Generics and Few Brands |         15        0.15       90.39
                   Few Brands |          4        0.04       90.43
                 Few Generics |         89        0.89       91.32
  Few Generics and Few Brands |        204        2.04       93.36
     Few Generics, Few Brands |        164        1.64       95.00
                Many Generics |         98        0.98       95.98
 Many Generics and Few Brands |          1        0.01       95.99
Many Generics and Some Brands |          4        0.04       96.03
    Many Generics, Few Brands |          7        0.07       96.10
   Many Generics, Some Brands |          7        0.07       96.17
                Some Generics |        361        3.61       99.78
Some Generics and Some Brands |          9        0.09       99.87
    Some Generics, Few Brands |          6        0.06       99.93
   Some Generics, Some Brands |          7        0.07      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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