The national average price of gasoline fell 3.5 cents to $1.724 for a gallon for the week ending Feb. 15, according to federal records.

The price is 55 cents lower than it was a year ago, and declined in eight of the nine regions tracked by the U.S. Energy Information Administration. The sharpest decline came on the West Coast with a 9.5-cent drop to $2.217 per gallon. The price increased four-tenths of a cent to $1.522 in the Midwest.

Among states, five states have gasoline that costs more than $2 per gallon, including Hawaii ($2.609), California ($2.396), Alaska ($2.263), Nevada ($2.073), and Washington ($2.037). Four states have gasoline that's cheaper than $1.50 per gallon, including Oklahoma ($1.407), Missouri ($1.411), Kansas ($1.444), and Arkansas ($1.494).

Meanwhile, the average price of a gallon of diesel increased 2.8 cents to $1.98 per gallon. Diesel is now 88.5 cents lower than it was a year ago.