The 2010 CIA World Factbook

by United States. Central Intelligence Agency

Bulgaria
18 years of age; universal

Burkina Faso
18 years of age; universal

Burma
18 years of age; universal

Burundi
18 years of age; universal (adult)

Cambodia
18 years of age; universal

Cameroon
20 years of age; universal

Canada
18 years of age; universal

Cape Verde
18 years of age; universal

Cayman Islands
18 years of age; universal

Central African Republic
21 years of age; universal