The 2009 CIA World Factbook

by United States. Central Intelligence Agency

New Zealand
22.4% of GDP (2008 est.)

Nicaragua
34.5% of GDP (2008 est.)

Nigeria
21.7% of GDP (2008 est.)

Norway
20.8% of GDP (2008 est.)

Oman
27.2% of GDP (2008 est.)

Pakistan
20% of GDP (2008 est.)

Panama
25.7% of GDP (2008 est.)

Papua New Guinea
19.4% of GDP (2008 est.)

Paraguay
19.6% of GDP (2008 est.)

Peru
25.9% of GDP (2008 est.)