The 2006 CIA World Factbook

by United States. Central Intelligence Agency

Singapore
21.8% of GDP (2005 est.)

Slovakia
26% of GDP (2005 est.)

Slovenia
24.8% of GDP (2005 est.)

South Africa
16.8% of GDP (2005 est.)

Spain
29.4% of GDP (2005 est.)

Sri Lanka
26.1% of GDP (2005 est.)

Sudan
16.3% of GDP (2005 est.)

Swaziland
10.6% of GDP (2005 est.)

Sweden
17% of GDP (2005 est.)

Switzerland
21.3% of GDP (2005 est.)