Energy Information Administration, April 30, 2010

http://www.eia.doe.gov/emeu/mer/pdf/pages/sec1_5.pdf

and

http://www.eia.doe.gov/cneaf/electricity/epm/tablees1a.html

Renewable sources (biomass, biofuels, geothermal, solar, water, wind) accounted for 10.94% of domestic U.S. energy production in January 2010, according to the latest "Monthly Energy Review" from the Energy Information Administration. This represents a 3.7% increase over the level produced in January 2009, when renewables accounts for 10.31% of domestic energy production. The figure for January 2008 was 9.92%. Since EIA began keeping records in 1973, U.S. energy production from all sources has increased by 15.16%; however, production from renewable energy sources has increased by 76.70%. Net electrical generation from non-hydro renewable energy sources accounted for 3.43% of electricity in January 2010, representing an increase of 4.45% over January 2009. Hydropower accounted for 6.13% of net electrical generation in January 2010; hydropower plus non-hydro renewables accounted for a total of 9.56% of net electrical generation in January 2010.