From 2001 to 2005 it is business as usual then from 2005 to 2007 you can see the economy overheating. Remember this is the period when gasoline went through the roof then in 2007 the summer usage spiked but did not plateau. I think the economy was starting to stall in 2007 as evidenced by the graph. 2008 & 9 saw a definite drop while '10 and '11 went back to business as usual these two years saw a healthy plateau during the summer season. Does anyone else see a correlation between 2007 and 2012? It was hot as hell in 2012 but there is no summer plateau.
http://www.eia.gov/beta/enerdat/#/to...aptype=0&rse=0