The 2010 CIA World Factbook

by United States. Central Intelligence Agency

Saudi Arabia
24.5% of GDP (2010 est.)

Senegal
25.9% of GDP (2010 est.)

Serbia
25.9% of GDP (2010 est.)

Seychelles
36.2% of GDP (2010 est.)

Singapore
27.2% of GDP (2010 est.)

Slovakia
22.2% of GDP (2010 est.)

Slovenia
18.7% of GDP (2010 est.)

South Africa
19.9% of GDP (2010 est.)

Spain
22.9% of GDP (2010 est.)

Sri Lanka
23.6% of GDP (2010 est.)