Monday, May 6, 2013
The above is from the AWEA quarterly report for Q1 2013 and shows cumulative installed capacity as well as additional capacity by year and quarter. Installations took a big setback in 2010, but have recovered based on huge levels of installation in Q4 2012 (following belated extension of the industry's tax credits).
The following shows the state level distribution of installed capacity. Texas, with a large area and lots of wind, leads the nation: