The 2004 CIA World Factbook

by United States. Central Intelligence Agency

Rwanda
19.3% of GDP (2003)

Sao Tome and Principe
51.6% of GDP (2003)

Saudi Arabia
18% of GDP (2003)

Senegal
21.3% of GDP (2003)

Serbia and Montenegro
14.3% of GDP (2003)

Seychelles
39.1% of GDP (2003)

Singapore
24.9% of GDP (2003)

Slovakia
25.8% of GDP (2003)

Slovenia
23.3% of GDP (2003)

South Africa
16% of GDP (2003)