Gas prices: Up 5% in three weeks

ATLANTA (CNN) -- Prices at the pump are up nearly 10 cents from three weeks ago, according to a survey published Sunday.

The average price of a gallon of self-serve regular gasoline was $2.05 on Friday, up about 9.6 cents from the last survey on March 20, the Lundberg Survey found.

"This is mostly seasonal demand talking, as gasoline demand always rises in spring and summer," said publisher Trilby Lundberg.

The price of crude oil has mostly been unchanged, she said.

More rises can be expected, barring any mishaps or threat to the oil supply, although the amounts will be tempered by the weakened economy, Lundberg said. "It might be as little as just a dime more in the next few weeks."

A survey conducted on April 18, 2008, showed gas prices reaching what was then an all-time record of $3.47 per gallon.

The survey, which tallies prices at thousands of gas stations nationwide, found the current lowest average price in Newark, N.J, where a gallon of self-serve regular cost $1.94.

The highest average was in Anchorage, Alaska, at $2.40.

Here are average prices in some other cities: Boise, Idaho - $1.94; Atlanta, Georgia - $1.95; Boston, Massachusetts - $1.99; Milwaukee, Wisconsin - $2.09; San Francisco Bay Area, California - $2.32; Los Angeles, California - $2.32; Baton Rouge, Louisiana - $1.91; Miami, Florida - $2.11; St. Louis, Missouri - $1.98.