The 2010 CIA World Factbook

by United States. Central Intelligence Agency

Bulgaria
2.6% of GDP (2005 est.)

Burkina Faso
1.2% of GDP (2006)

Burma
2.1% of GDP (2005 est.)

Burundi
5.9% of GDP (2006 est.)

Cambodia
3% of GDP (2005 est.)

Cameroon
1.3% of GDP (2009)

Canada
1.1% of GDP (2005 est.)

Cape Verde
0.5% of GDP (2009)

Central African Republic
0.9% of GDP (2009)

Chad
1.7% of GDP (2009)