An Energy Information Administration survey of 31 independent energy companies revealed a 23% decrease in net income in 4Q 2008, relative to the record high set in 4Q 2007. Lower earnings for producers resulted from the sharp fall in oil prices. However, net income was still 9% above the 4Q average over the last 5 years. Also, oilfield service companies' net income decreased 2% in 4Q 2008, compared to the year-ago quarter, after reaching a 4Q high in 2006. Much of the income decrease was because a number of oilfield companies also have significant oil and gas production segments, which sustained reserve impairment losses. For 2008 as a whole, income increased 8% and revenue increased 19% over 2007. In the downstream sector, refiner/marketer earnings were down sharply from the high reached in 4Q 2007, but were still above all previous 4Q earnings since at least 2002.