The Global Wind Energy Council, a trade association based in Brussels, estimates that wind power capacity grew by 31 percent worldwide in 2009, with 37.5 additional gigawatts installed, bringing global wind power capacity to 157.9 gigawatts. China accounted for a third of the new capacity, and the Chinese market experienced more than 100 percent growth. According to the trade group, more than 500,000 people are now employed by the wind power industry around the world, and the market for wind turbine installations last year was worth about $63 billion. The primary markets today are in Asia, Europe and North America.

The market in the United States grew by 39 percent, with nearly 10 gigawatts of new capacity installed in 2009. The total installed and grid-connected capacity in the United States is about 35 gigawatts, according to the trade group.

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