The 2006 CIA World Factbook

by United States. Central Intelligence Agency

Saudi Arabia
6.544 trillion cu m (2005)

Serbia
48.14 billion cu m (1 January 2002)

Slovakia
15.01 billion cu m (1 January 2003)

Somalia
5.663 billion cu m (1 January 2002)

South Africa
28.32 million cu m (1 January 2002)

Spain
2.662 billion cu m (1 January 2002)

Sudan
84.95 billion cu m (2005)

Suriname
0 cu m (2005)

Syria
240.7 billion cu m (2005)

Taiwan
76.46 billion cu m (2005)