The 2003 CIA World Factbook

by United States. Central Intelligence Agency

Puerto Rico
630 million cu m (2001 est.)

Qatar
15.86 billion cu m (2001 est.)

Romania
19.7 billion cu m (2001 est.)

Russia
408.1 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
2.5 billion cu m (2001 est.)

Slovakia
7.932 billion cu m (2001 est.)

Slovenia
1.04 billion cu m (2001 est.)