AAA Michigan says gas prices statewide have decreased by about 12 cents in the past week.
The Dearborn-based auto club says the average price for self-serve regular unleaded gasoline was about $1.81 per gallon on Sunday. That's about $1.06 less than it was at the same point last year. The last time the average statewide gas price was at the $1.81 mark was Feb. 25, 2009.
The lowest average price was about $1.71 per gallon in the Saginaw, Bay City and Midland areas, while the highest average was about $1.94 per gallon in the Marquette area.
AAA Michigan surveys daily fuel prices at 2,800 gas stations across the state.