At the end of the year 2000, the amount of wind energy capacity in the world was 17.7 GW. By the end of 2010, the capacity was 191 GW. That represents a compound annual growth rate of 25%. Such a high growth rate was unsustainable and the increases have declined since that time. The growth rate in 2013 was 12%, but that represented an increase of 33 GW - nearly twice the capacity that was operational in the year 2000. There are strong indications that 2014 is likely to be a higher-growth year, with the installed capacity likely to be around 45 GW.
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