Other countries with the largest gains in production over the last decade, following the U.S., are Iraq, Canada, Brazil, and the United Arab Emirates. Canada ranked seventh in the world in 2008 with a 3.9% world share but it rose to fourth globally with a 5.5% share last year. Iraq moved up six spots to sixth in the world. Kazakhstan and Qatar also each moved up six spots to 13th and 14th among the world producers. The Republic of Congo moved up seven spots, but accounts for a relatively small 0.35% share of global oil output.
Countries in turmoil were the largest decliners over the past decade, namely Syria, Venezuela, Sudan and Yemen. Syria fell 16 spots, Venezuela 11 and Sudan and Yemen each dropped 10 spots in the global ranking of output. Venezuela, the largest producer among the four, is now ranked 17th in the world with a 1.6% share.
Oil production from countries in the Persian Gulf and Arabian Sea regions rose from a 31.2% global share in 2008 to 33.3% by 2018.