Legend (Percent_of_charter_schools_by_state)

- (0) < 20 charters per 1000 schools 21 to 45 charters per 1000 schools 46 to 85 charters per 1000 schools 86 to 200 charters per 1000 schools > 200 charters per 1000 schools

No provision for charter schools in 2010-11 (1)