region cumulative reserves undiscovered total gas

production resources endowment

United States 22.4 4.6 11.2 38.2

Canada 2.6 2.7 10.3 15.6

Mexico 0.8 2.0 4.4 7.2

South America 1.8 5.5 5.9 13.2

Western Europe 4.1 5.4 5.8 15.3

Russia and Ukraine 8.6 47.0 45.0 100.6

Transcaucasia and Central Asia 2.9 10.7 6.6 20.2

Middle East 2.1 44.3 31.5 77.9

Africa (including North Africa) 1.1 9.6 12.4 23.1

China 0.5 1.7 7.3 9.5

Oceania and Asia (excluding China) 2.0 8.3 13.0 23.3

Total world 48.9 141.8 153.4 344.1

*In trillion cubic metres; figures adapted from Oil & Gas Journal and U.S. Geological

Survey.