Samoa
4.3% of GDP (2002)

San Marino
NA

Sao Tome and Principe
NA

Saudi Arabia
6.8% of GDP (2004)

Senegal
5% of GDP (2006)

Serbia
NA

Seychelles
6.5% of GDP (2006)

Sierra Leone
3.8% of GDP (2005)

Singapore
3.7% of GDP (2001)

Slovakia
3.9% of GDP (2005)