WASHINGTON, D.C. --- The U.S. average retail price for regular gasoline increased by 10 cents last week, rising to $2.783 per gallon as of April 17, the Energy Department reported. That's 54.6 cents higher than last year. Prices rose for the third week in a row, reaching their highest level since Oct. 10, 2005, reported the department's Energy Information Administration (EIA). Prices climbed throughout the country, with the East Coast seeing the largest increase of 11.2 cents to reach $2.801 per gallon. West Coast prices, the highest regional prices in the country, added 9.2 cents to average $2.843 per gallon. California prices rose 8.5 cents to reach $2.896 per gallon. Midwest prices gained 10.1 cents to $2.755 per gallon, which was 60.5 cents higher than this time last year, the EIA said. Retail diesel fuel prices increased by 11.1 cents to reach $2.765 per gallon as of April 17, which is 50.6 cents higher than last year. Prices climbed throughout the country, with the Gulf Coast seeing the largest regional increase of 12.4 cents to $2.725 per gallon, the lowest regional price in the country. West Coast prices were still the highest regional prices in the nation, adding another 6.9 cents to reach $2.881 per gallon, the EIA reported.