region recoverable resources**

United States 626

Canada 16

South America (Brazil) 300

Northern and western Europe 2

Italy 13

Estonia 1

Russia 41

Zaire 38

China 10

Australia 17

Other countries 3

Total world 1,067

*Recovery factor = 37.5 percent of estimated in-place resource.

**In billion barrels; figures adapted from Oil & Gas Journal,

U.S. Geological Survey, and American Association of

Petroleum Geologists.