Input (grade 7): Germany was, until 2007, the world's largest user of wind power with an installed capacity of 22.3 GW that year, ahead of USA which had an installed capacity of 16.8 GW.
Output (grade 10): Germany is the world's biggest user of wind power with an installed capacity of 20,621 MW in 2006, ahead of Spain which had 11,615 MW.