The 2009 CIA World Factbook

by United States. Central Intelligence Agency

Bermuda
0.11% of GDP (2005 est.)

Bhutan
1% of GDP (2005 est.)

Bolivia
1.9% of GDP (2006)

Bosnia and Herzegovina
4.5% of GDP (2005 est.)

Botswana
3.3% of GDP (2006)

Brazil
2.6% of GDP (2006 est.)

Brunei
4.5% of GDP (2006)

Bulgaria
2.6% of GDP (2005 est.)

Burkina Faso
1.2% of GDP (2006)

Burma
2.1% of GDP (2005 est.)