High Quality Content by WIKIPEDIA articles! Spain is the world`s fourth biggest producer of wind power, after China, the United States and Germany, with an installed capacity of 19,959 megawatts (MW) at the end of 2010, a rise of 1,609 MW for the year. Wind energy has consolidated as the third technology of the Spanish power system in 2010, having reached an output of 42,976 GWh, only overtaken by thermal gas combined cycle at 68,828 GWh and nuclear that reached 61,944 GWh. In 2009, for the first time in the annual calculation, wind overtook coal that produced 33,844 GWh. In 2010, wind energy has covered 16% of the demand, compared to 11.5% in 2008 and 13.8% in 2009.