PORTLAND — Gas prices in Maine have dropped nearly a penny in the last week, averaging $2.20 a gallon.

The result is from Gasbuddy.com, which surveyed 1,228 gas stations in the state.

The national average has fallen 1.1 cents, to $2.18 a gallon.

The price in Maine was 87.8 cents less per gallon than a year ago, and 5.2 cents per gallon lower than a month ago. The national average decreased 10.9 cents per gallon during the last month and is 79 cents lower than a year ago.