Denmark has considerably large deposits of oil and natural gas in the North Sea and ranks as number 32 in the world among net exporters of crude oil and was producing 259,980 barrels of crude oil a day in 2009. Denmark is a long-time leader in wind power: In 2015 wind turbines provided 42.1% of the total electricity consumption.  Denmark derived 3.1% of its gross domestic product from renewable (clean) energy technology and energy efficiency, or around €6.5 billion ($9.4 billion). Denmark is connected by electric transmission lines to other European countries.