As expected, average retail gasoline prices in Maine have begun rising, up 10.5 cents per gallon in the past week, according to GasBuddy’s daily survey of 1,228 gas outlets in Maine.

The average retail price stood at $2.20 on Sunday.

This compares with a national average that’s up 12.6 cents per gallon in the last week to $2.17 a gallon, according to gasoline price website

Despite the upward trend, survey prices were roughly $1.26 per gallon lower than the same day one year ago and 9 cents per gallon lower than a month ago.

“This past week, gasoline prices saw the largest weekly incline since July 2013,” said Patrick DeHaan, senior petroleum analyst with GasBuddy. He attributed the trend to crude oil price increases and strikes at gasoline refineries. Refineries also are beginning spring maintenance ahead of making more expensive summer fuel blends that limit air pollution.

DeHaan said he expected the pace of increases to slow in the week ahead, but not stabilize.

There’s one bright spot, especially for truckers. Diesel prices aren’t rebounding, and DeHaan said they will likely continue to drift lower.

Gone are the days of $2 gasoline, though, in Maine and nationally. In the last week, the percentage of gas stations nationally selling under $2 a gallon has shrunk by a large margin, according to GasBuddy. A week ago, more than half of all gas stations were under $2; now it’s down to 27 percent.

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