Bankrate

Even with the rate reductions by Bank of Internet and Ascencia, the top nationally available rates still dwarf the 12-month rates offered by large banks and thrifts, which are paying an average annual yield of 0.48% APY — the lowest it's been since Bankrate began tracking this rate in October 1983...

Source: http://www.bankaholic.com/little-movement-in-best-1-year-cd-rates/