The national average price of a gallon of gasoline fell 3.4 cents to $1.822 for the week ending Feb. 1, according to federal records.

The price is now 24.6 cents lower than it was a year ago and has continued an almost unabated downward trajectory since August. The price fell in nine regions tracked by the U.S. Energy Information Administration. The sharpest declines came on the West Coast and California. The average price fell 8.4 cents to $2.375 on the West Coast and 6.8 cents to $2.073 on the West Coast without California. The Gulf Coast and Midwest now have the cheapest gas as $1.59 and $1.622 respectively.

Among states, Hawaii's gasoline is now the most expensive with an average price of $2.632. California gasoline costs $2.579. Five other states and the District of Columbia have gasoline above $2. Oklahoma now has the nation's cheapest gasoline at $1.489.

Meanwhile, the average price of diesel fell 4 cents to $2.031. Diesel is now 80 cents lower than it was a year ago.