The 2008 CIA World Factbook

by United States. Central Intelligence Agency

Chile
18 years of age; universal and compulsory

China
18 years of age; universal

Cocos (Keeling) Islands
NA

Colombia
18 years of age; universal

Comoros
18 years of age; universal

Congo, Democratic Republic of the 18 years of age; universal and compulsory

Congo, Republic of the
18 years of age; universal

Cook Islands
NA years of age; universal (adult)

Costa Rica
18 years of age; universal and compulsory

Cote d'Ivoire
18 years of age; universal