The 2007 CIA World Factbook

by United States. Central Intelligence Agency

Rwanda
19.8% of GDP (2006 est.)

Sao Tome and Principe
35.2% of GDP (2006 est.)

Saudi Arabia
16.2% of GDP (2006 est.)

Senegal
41% of GDP (2006 est.)

Serbia
14.2% of GDP (2005 est.)

Seychelles
44.2% of GDP (2006 est.)

Singapore
21.8% of GDP (2006 est.)

Slovakia
27.6% of GDP (2006 est.)

Slovenia
25% of GDP (2006 est.)

South Africa
17.1% of GDP (2006 est.)