The 2010 CIA World Factbook

by United States. Central Intelligence Agency

Antigua and Barbuda
3.9% of GDP (2002)

Argentina
4.9% of GDP (2007)

Armenia
3% of GDP (2007)

Aruba
4.9% of GDP (2007)

Australia
4.7% of GDP (2007)

Austria
5.4% of GDP (2007)

Azerbaijan
1.9% of GDP (2008)

Bahamas, The
3.6% of GDP (2000)

Bahrain
2.9% of GDP (2008)

Bangladesh
2.4% of GDP (2008)