The R.L. Polk and Co. figures show 837,743 hybrid-electric, ethanol-capable E-85 and clean diesel autos on California's roads in 2006, marking an increase of 17 percent from 2005 when there were approximately 700,000 alternative fuel autos on the state's roads. California ranks second in the nation in terms of the total number of alternative fuel autos on the road. The Polk sales figures also reveal that nationally, 1.5 million alternative fuel autos were sold in 2006, surpassing automakers' sales expectations by 50 percent. The 2006 sales bring the total number of alternative fuel autos on the nation's roads to 10.5 million. Currently manufacturers are offering 60 models of alternative fuel automobiles for sale including hybrid electric, ethanol-capable E-85, and clean diesel, up from just 12 models for sale in 2000. A complete list of available vehicles can be found at