The average U.S. price of regular-grade gasoline shot up 8 cents a gallon over the past two weeks to $2.74.

Industry analyst Trilby Lundberg said Sunday the increase was driven primarily by rising crude oil prices.

The current gas price is 30 cents above where it was a year ago.

The highest average price in the contiguous 48 states was $3.63 in the San Francisco Bay area. The lowest was $2.37 in Baton Rouge, Louisiana.

The average price for diesel fuel rose three cents, to $3.04.