The 2010 CIA World Factbook

by United States. Central Intelligence Agency

Brazil
5.2% of GDP (2007)

British Virgin Islands
3.2% of GDP (2007)

Brunei
3.7% of GDP (2000)

Bulgaria
4.1% of GDP (2007)

Burkina Faso
4.6% of GDP (2007)

Burma
1.2% of GDP (2001)

Burundi
7.2% of GDP (2008)

Cambodia
1.6% of GDP (2007)

Cameroon
2.9% of GDP (2008)

Canada
4.9% of GDP (2007)