Renewable Energy Production and Consumption by Source
http://www.eia.gov/totalenergy/data/monthly/pdf/sec10_3.pdf
as the energy report you gave us the link for demonstrates
the drought is NOT entirely to blame
production for biofuels has been exceeding comsumption (in the annual totals) since then end of 2007, and even in 2010, 2011 and 2012 only a few months demonstrate production levels lower than consumptions levels
time to end all ethanol subsidies of any kind and let it stand or fall on the sheer, and unpolitcized, economics of the marketplace