Can't find any statistics on what % of world oil supply comes from Iraq... I did find this old article from 4/2002 http://www.atimes.com/global-econ/DD10Dj01.html "The decision affects 2 million barrels per day, or 4 percent of international oil supplies, according to figures from the Organization of Petroleum Exporting Countries (OPEC)." apparently they shut off their oil in March or April....