The 2003 CIA World Factbook

by United States. Central Intelligence Agency

Nigeria
15.68 billion cu m (2001 est.)

Norway
54.6 billion cu m (2001 est.)

Oman
13.77 billion cu m (2001 est.)

Pakistan
23.4 billion cu m (2001 est.)

Papua New Guinea
110 million cu m (2001 est.)

Peru
370 million cu m (2001 est.)

Philippines
10 million cu m (2001 est.)

Poland
5.471 billion cu m (2001 est.)

Portugal
0 cu m (2001 est.)

Puerto Rico
0 cu m (2001 est.)