(AP) — The average U.S. price of a gallon of gasoline has dropped 2 cents over the past two weeks.

The Lundberg Survey of fuel prices released Sunday says the price of a gallon of regular is $3.36. Midgrade costs an average of $3.56 a gallon, and premium is $3.71.

Diesel was down a penny at $3.91 gallon.

Of the cities surveyed in the Lower 48 states, Albuquerque, N.M., has the nation’s lowest average price for gas at $3.03. San Francisco has the highest at $3.81.

In California, the lowest average price was $3.64 in Sacramento. The average statewide for a gallon of regular was $3.74, a drop of 9 cents.

In Nebraska, the average price of regular is $3.35 per gallon.