The 2008 CIA World Factbook

by United States. Central Intelligence Agency

New Zealand
23.3% of GDP (2007 est.)

Nicaragua
31.8% of GDP (2007 est.)

Nigeria
23.7% of GDP (2007 est.)

Norway
20.8% of GDP (2007 est.)

Oman
20% of GDP (2007 est.)

Pakistan
21.3% of GDP (2007 est.)

Panama
20.2% of GDP (2007 est.)

Papua New Guinea
19.3% of GDP (2007 est.)

Paraguay
18.9% of GDP (2007 est.)

Peru
23% of GDP (2007 est.)