BISMARCK, N.D. (AP) — Drivers in the Dakotas this Memorial Day are paying much less for gas than they were at the same time last year.

AAA reports that the average price of a gallon of gas in North Dakota is down 67 cents from May 2013, and in South Dakota the average is down 43 cents over the year.

The travel association says the reason is that Midwestern refinery issues last year caused sharp regional price spikes prior to Memorial Day. Fargo, Bismarck and Grand Forks set records in May last year when the price of gas soared well above $4 per gallon. The state average also hit a record, at $4.23 a gallon.

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