UK Fuel Price Progression
The following chart is derived from live data automatically produced from a spreadsheet I update each time I fill up the car with petrol. I started doing this to see what MPG I was getting from my car, but it also shows the trend of fuel price change. The fuel was mainly purchased in the South-East UK, so the price might be slightly different where you are, but I'd have though the trend will be the same. Unfortunately I only started recording the price in July 2007, but here's the data so far.
Changing Fuel Price Over Time
The progression of unleaded petrol prices in pence-per-litre