Wind power currently supplies about 2.5 percent of global electricity consumption. Industry projections show that wind power will, with the right policy support, double in capacity by 2015 and again by the end of this decade. This will deliver somewhere between 8 and 12 percent of global electricity supply. Wind provides 30% of electricity in Denmark and also makes a double digit contribution of 16% in Portugal and Spain. It contributes more than 40% of annual electricity in three German states and 20% of South Australia's electricity.
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