The 2003 CIA World Factbook

by United States. Central Intelligence Agency

Qatar
32.4 billion cu m (2001 est.)

Romania
14.3 billion cu m (2001 est.)

Russia
580.8 billion cu m (2001 est.)

Saudi Arabia
53.69 billion cu m (2001 est.)

Senegal
50 million cu m (2001 est.)

Serbia and Montenegro
602 million cu m (2001 est.)

Singapore
0 cu m (2001 est.)

Slovakia
292 million cu m (2001 est.)

Slovenia
0 cu m (2001 est.)

South Africa
1.8 billion cu m (2001 est.)