The summer driving season is expected to rival 2007 levels, according to AAA.

The national average price of gas has dipped—a sign prices may have started to stabilize in light of refineries upping production to accommodate record-high demand.

AAA reported that the average price of gas, as of May 9, is $2.21—17 cents higher than a month ago and 45 cents lower per gallon compared to the same time last year.

The latest data from the U.S. EIA, revealed that total U.S. gasoline supplies are at their highest levels to start May on record.

“Historically gasoline demand increases leading into the summer driving season, and this year so far is no different. However, lower gas prices are contributing to drivers taking to the roads at record levels and the 2016 summer driving season is expected to rival 2007 when gasoline demand hit an all-time high,” according to AAA.

California continues to be the most expensive market in the U.S. at $2.80 per gallon, followed by Hawaii ($2. 64).

Meanwhile, Oklahoma ($1.95), Kansas ($1.98) and Missouri ($1.98) boast the least expensive fuel per gallon nationwide.

The Midwest continues to experience volatility. Retailer averages are down double-digits this week while last week several Midwestern states were posting double-digit increases week-over-week.