Yemen is an oil producer and has massive untapped offshore oil and gas. Unlike many regional oil producers, Yemen relies heavily on foreign oil companies that have production-sharing agreements with the government. Income from oil production constitutes 70 to 75 percent of government revenue and about 90 percent of exports. Yemen contains proven crude oil reserves of more than , although that is falling from the country's older fields has been wrecked by war and corruption since oil provides around 90% of the country's exports. The World Bank predicts that Yemen's oil and gas revenues will plummet during 2009 and 2010, and fall to zero by 2017 as supplies run out, and UK's Royal Institute for International Affairs warns that instability there could expand a zone of lawlessness from northern Kenya to Saudi Arabia, while describing Yemen's democracy as fragile and pointing to armed conflicts with Islamists and tribal insurgents. Thus western and other diplomats and leaders are concerned to preserve Yemen's stability and to avert adverse outcomes. According to statistics published by the Energy Information Administration, crude oil output averaged in 2005, a reduction from in 2004. For the first eight months of 2006, crude oil output was flat, averaging .