The national gas price average has dropped four cents since the beginning of June, the Triple A motor club said Monday.

The average is three cents less than a week ago, but six cents more than a month ago and 58 cents more than a year ago.

“Gas prices continue to dip across the country, but remain nearly 50-cents more expensive than last summer in every state,” said Jeanette Casselano, AAA gas price expert.

The nation’s top 10 least expensive markets are: South Carolina ($2.58), Mississippi ($2.61), Alabama ($2.61), Oklahoma ($2.62), Louisiana ($2.62), Arkansas ($2.65), Tennessee ($2.67), Missouri ($2.68), Virginia ($2.70) and Kansas ($2.73).

Nebraska’s average price is $2.83, AAA said.