The 2004 CIA World Factbook

by United States. Central Intelligence Agency

Brunei
none

Bulgaria
18 years of age; universal

Burkina Faso
universal

Burma
18 years of age; universal

Burundi
NA 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