The 2008 CIA World Factbook

by United States. Central Intelligence Agency

Brazil
17.6% of GDP (2007 est.)

Bulgaria
29.8% of GDP (2007 est.)

Burkina Faso
21.1% of GDP (2007 est.)

Burma
13.1% of GDP (2007 est.)

Burundi
24.4% of GDP (2007 est.)

Cambodia
19.2% of GDP (2007 est.)

Cameroon
17.3% of GDP (2007 est.)

Canada
22.6% of GDP (2007 est.)

Cape Verde
37% of GDP (2007 est.)

Chad
11.4% of GDP (2007 est.)