Energy Information Administration, March 31, 2010

In its latest "Monthly Energy Review," the Energy Information Administration confirms continued growth for renewable energy, which accounted for 10.66% of domestic energy production in 2009. By comparison, renewables accounted for 10.10% of domestic energy production in 2008 and 9.44% in 2007. Renewable energy sources (biofuels, biomass, geothermal, solar, wind, water power) provided 7.833 quadrillion Btus in 2009 - an increase of 5.5% over 2008 and an increase of 15.8% over 2007.  The largest single renewable energy source was biomass (including biofuels) which accounted for 51.0% of renewable energy production, followed by hydropower at 34.2%. Wind, geothermal, and solar sources provided 8.9%, 4.7%, and 1.2% of the total renewable energy output respectively. By comparison, nuclear output in 2009 dropped for the third year in a row - declining by 1.2% from the 2008 level and 1.5% from the 2007 level. Nuclear power accounted for 11.33% of domestic energy production in 2009. (see Tables 1.1 and 1.2 for details)

http://www.eia.doe.gov/emeu/mer/overview.html