Asia
(An oil barrel is 159 liters, or 42 gallons.) It also has the world’s largest oil reserves, at roughly 250 billion barrels. Saudi Arabia’s economy is heavily dependent on oil exports, which account for 80 to 90 percent of the country’s total revenues. Saudi Arabia, Iran, and the United Arab Emirates accounted for roughly 57 percent of global liquid fuels production in 2010. South Asian Countries Indeed other factors, such as decreases in spouse mortality and reduced durations in breastfeeding, would probably have led to rising marital fertility in the absence of increased contraceptive practice. This is due primarily to the presence of the world's two most populous countries, China and India, which have 1.44 and 1.38 billion people respectively. Links to multiple guides (including Chinese Studies Resources and Services @ Pitt) -- which introduce major Chinese print and electronic resources accessible to Pitt-affiliated users. South Asian Economies: By Country The Center is a