The 2008 CIA World Factbook

by United States. Central Intelligence Agency

Bermuda
1.2% of GDP (2006)

Bhutan
7% of GDP (2005)

Bolivia
6.4% of GDP (2003)

Bosnia and Herzegovina
NA

Botswana
8.7% of GDP (2007)

Brazil
4% of GDP (2004)

British Virgin Islands
3.7% of GDP (2006)

Brunei
5.2% of GDP (2000)

Bulgaria
4.5% of GDP (2005)

Burkina Faso
4.2% of GDP (2006)