The national gas price of unleaded gas raised four cents to $2.53 from last week, as demand for gasoline for the month of January was the highest it has been since 2011, according to AAA.

Demand for gasoline increased 160,000 barrels on the week to register at 8.8 million, according to the Energy Information Administration.

“The EIA’s gasoline demand measurement is higher than any week in January last year,” said Jeanette Casselano, AAA spokesperson. “If demand continues to climb, motorists are likely to see pump prices increase too, paving the way for even more expensive fill-ups. This month’s average is already 19-cents more than last January.”

States with the largest weekly changes includes Kansas (up 9 cents), Kentucky (up 9 cents), Indiana (up 9 cents), Iowa (up 9 cents), Michigan (up 7 cents), Minnesota (up 7 cents), Oklahoma (up 7 cents), Missouri (up 7 cents), Georgia (up 7 cents) and Nebraska (up 6 cents).

States with the least expensive gasoline include Texas ($2.28), Alabama ($2.28), Mississippi ($2.29), Missouri ($2.30), Arkansas ($2.30), South Carolina ($2.30), Oklahoma ($2.32), Arizona ($2.32), Louisiana ($2.33) and Virginia ($2.34).

Meanwhile, the price of a gallon of diesel increased 3 cents on the week to $3.028, which is 44.3 cents higher than a year ago, according to the U.S. Energy Information Administration.