Iran exported well over 844 million barrels of oil in the one year to March 21, 2010, averaging around 2.3 million barrels a day.

The exports included around 259 million barrels of light crude and more than 473 million barrels of heavy crude oil, reported IRIB. The remaining 112 million were other types of crude.

Japan, China, South Africa, Brazil, Pakistan, Sri Lanka, Spain, India and the Netherlands are the main importers of Iran's crude oil.

Iran ranks third in the world in oil reserves and second in natural gas reserves.

Iran is one of the leading members of the Organization of Petroleum Exporting Countries (OPEC) and the Gas Exporting Countries Forum(GECF).

Oil income accounts for 80% of Iran's foreign currency revenues and 60% of the nation's overall budget.

Source:- http://www.presstv.com/detail.aspx?id=130736§ionid=351020102