Gasoline prices here are the weekly US national average from the EIA's This Week in Petroleum, adjusted via the Consumer Price Index. The blurriness is brought to you by Google (who owns Blogger). Click on the graph to get a clearer version.
I keep track of what I pay for gas, and my mileage, and while I haven't adjusted it for statewide inflation here is what I've paid since two years before I moved to Oregon in 2006:
So there hasn't been much of any increase here, and would obviously be a slight decrease over time if adjusted for inflation.