Photo via Wikipedia.

Photo via Wikipedia.

The national average price of gasoline fell 5.5 cents to $3.299 per gallon for the week ending Oct. 6, according to federal data.

The decline in price for a gallon of regular unleaded gasoline has continued nearly unabated since late June, when it averaged $3.704 per gallon. It now costs 6.8 cents less than it did a year ago.

For the week, gasoline prices fell in all nine regions tracked by the U.S. Energy Information Administration, which is a division of the U.S. Department of Energy. The sharpest decline came in the Midwest region where it fell 10.4 cents to $3.195 followed by the Rock Mountain region, where it slipped 6.1 cents to $3.433 per gallon.

The average price of gasoline now costs at least $3.50 in eight states and the District of Columbia, according to AAA's Daily Fuel Gauge Report.

Meanwhile, the national average price of diesel fell 2.2 cents to $3.733 per gallon. Diesel now costs 16.4 cents less than it did a year ago.