The 2008 CIA World Factbook

by United States. Central Intelligence Agency

Central African Republic
1.1% of GDP (2006 est.)

Chad
4.2% of GDP (2006)

Chile
2.7% of GDP (2006)

China
4.3% of GDP (2006)

Colombia
3.4% of GDP (2005 est.)

Comoros
2.8% of GDP (2006)

Congo, Democratic Republic of the
2.5% of GDP (2006)

Congo, Republic of the
3.1% of GDP (2006)

Costa Rica
0.4% of GDP (2006)

Cote d'Ivoire
1.6% of GDP (2005 est)