PROVIDENCE, R.I. — Gas prices are down again in Rhode Island, dropping by one penny since last week.

AAA Northeast said Monday that gas prices are averaging $2.29 per gallon. That’s equal to the national average.

Last year at this time, the average price of a gallon of regular in Rhode Island was at the same price.

AAA found self-serve, regular selling for as low as $2.19 and as high as $2.40 per gallon.

AAA says gas prices dropped in all but four states over the past week. High oil production rates in the U.S. and lower demand could lead to gas prices continuing to fall through the end of June.