UNDATED - The average price of regular-grade gasoline in the United States jumped 3 cents over the past three weeks, to $3.25 per gallon.

Industry analyst say that gas prices could stop climbing now that crude oil costs have started to fall.

The price at the pump is a dollar higher than it was a year ago. Nationwide, the highest average price for regular-grade gas is $4.50 per gallon in the San Francisco Bay Area.

The lowest average is $2.74 per gallon in Baton Rouge, Louisiana.

According to the survey taken Friday, the average price of diesel was $3.33 a gallon. That's up 2 cents from three weeks earlier.