Gas prices have stayed about the same in northern New England.The latest GasBuddy price reports show the average price of gas in Vermont is down less than penny in the last week, at $2.60 a gallon. The price rose slightly in Maine, averaging $2.52, while it stayed the same in New Hampshire at $2.44 a gallon.Nationally, the average price of gasoline fell slightly in the last week, averaging $2.63. The national average has dropped 2.7 cents per gallon in the last month, but is still 19.8 cents per gallon lower than a year ago.