Gas prices continued to decrease this week, even after the July Fourth holiday. On Tuesday, the national average cost for regular gas dropped to $3.149 per gallon, according to AAA.

Tuesday’s fuel costs were slightly less expensive than a week ago, when the average price for regular gas was $3.171 per gallon. Prices are also lower than on the last day of June, when regular gas in the country was $3.185 per gallon. Fuel costs were substantially lower than a year ago, when the national average price for regular gas was a whopping $3.519 per gallon.