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Gasoline’s national average price fell 3.9 cents in the past two weeks to $2.73 a gallon, according to the latest Lundberg Survey of filling stations released Sunday.

Despite the downturn, the price i17 cents over the same week last year, analyst Trilby Lundberg said in her twice-monthly survey, which was conducted Friday.

Mid-grade and premium grades also fell 4 cents each, to $2.87 and $2.98 a gallon, respectively.

Jackson, Miss., had the lowest average price among cities surveyed at $2.43 a gallon, while San Francisco was the highest, at $3.16.