Prices have increased every week but one since Jan. 9 and are the highest point since Aug. 25, 2008.
The national average price fell 4.3 cents to $4.061 but is still 96.7 cents higher than a year earlier.
The national average price is at its highest level since Sept. 29, 2008, when it was $3.959.
The national average price is 77.8 cents higher than the same week last year.
The average price is more than 37 cents higher than at the end of September when prices started climbing.
The national average price fell 0.9-cent to $3.162, after falling 1.3 cents the previous week.
The national price declined 2.2 cents to $2.957 in the latest week.
The price fell 3.3 cents to $3.094 in the latest week, the biggest drop in 16 weeks.
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