PORTLAND — Gas prices in Maine have dropped 4.5 cents per gallon in the past week.

The average retail gas price in Maine was $2.60 per gallon on Sunday. The figure is based on a GasBuddy.com survey of 1,228 gas outlets in the state. The national average price was the same, falling 5.4 cents per gallon over the past week.

Maine gas prices were 96.3 cents less per gallon than the same day in 2014 and 17.9 cents lower than a month ago.

The national average price is 87.9 cents cheaper than a year ago and 16.2 cents less per gallon than a month ago.