World wind generation capacity more than quadrupled between 2000 and 2006, doubling about every three years. The United States pioneered wind farms and led the world in installed capacity in the 1980s and into the 1990s. In 1997 installed capacity in Germany surpassed the . and led until once again overtaken by the . in 2008. China has been rapidly expanding its wind installations in the late 2000s and passed the . in 2010 to become the world leader. As of 2011, 83 countries around the world were using wind power on a commercial basis.