The average U.S. price of regular-grade gasoline has dropped a penny per gallon over the past two weeks, to $2.90.
Industry analyst Trilby Lundberg of the Lundberg Survey says that's 28 cents higher than at this time last year.
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Lundberg said Sunday it's likely that gas prices will continue to drop slightly.
The highest average price in the contiguous 48 states is $3.69 in the San Francisco Bay Area.
The lowest average is $2.50 in Jackson, Mississippi.
The average diesel fuel price is $3.24, up a penny per gallon from two weeks ago.