Every month, the Federal Energy Regulatory Commission puts out a report called the "Energy Infrastructure Update" [PDF]. It is done in Microsoft Word by someone whose first priority isn't aesthetics.
But it does contain interesting information! Among which, this time: From January through October, 46.2 percent of new electricity generating capacity added in the U.S. was renewable.
From Renewable Energy World:
During the first ten months of 2012, 92 wind projects (5,403 MW), 167 solar projects (1,032 MW), 79 biomass projects (409 MW), seven geothermal projects (123 MW), and 9 water power projects (12 MW) have come on-line. Collectively, these total 6,979 MW or 46.22% of all new generating capacity added since the beginning of the year.
By comparison, new natural gas capacity additions since January 1, 2012 totaled 67 projects (5,702 MW) or 37.8% while three new coal projects added 2,276 MW (15.1%). Nuclear and oil represented just 0.8% and 0.1% of new capacity additions respectively.
For the first 10 months of 2011, renewable energy constituted just under 30 percent of new generation capacity.