In 2010 and in 2009, Iowa led the U.S. in the percentage of electrical power generated by wind, at 15.4 percent and 14.2 percent.[10] This was up from 7.7 percent in 2008, as there was a large increase in the installed capacity in 2008.[11] Some of the wind power generated electricity is sold to utility companies in nearby states, such as Wisconsin,[12] and Illinois.[13]