America's wind industry had over 46,000 megawatts of power installed by the end of 2011 and had more than 8,000 megawatts under construction. All that wind adds up to a major source of power for America and especially for 5 states that now get more than 10% of their electricity from wind.
South Dakota, Iowa, North Dakota, and Wyoming in 2011 all generated more than 10% of their electricity from wind in 2010. http://www.awea.org/newsroom/pressreleases/Annual_Report.cfm. Additionally given wind farms under construction there, Kansas and Oregon probably will join the 10% wind power club in 2012 and push membership to 7 states.
In 2011, South Dakota lead the nation in the highest percentage of electricity coming from wind at 22%, with Iowa hitting more than 18%, and ranking a close second.
These are extraordinary numbers.