For the 12th week in a row, diesel prices across the U.S. have continued to drop, though by only less than a penny this week, according to the most recent data from the Energy Information Administration (EIA). This week, average U.S. diesel prices dropped two tenths of a cent to $2.615 from last week’s $2.617, EIA said. This week diesel is $1.220 per gallon cheaper compared to the same week last year.Diesel prices decreased in every region except for the Midwest, which was up 2.4 cents to $2.539 compared to last week’s $2.515. All regions came in under the $3 per gallon mark. For the first time in nearly three months, average U.S. retail pump prices for gasoline increased, according to EIA. Gas prices are up 8.7 cents to $2.716 per gallon. According to EIA, that is 75.6 cents less than the same week last year.Gasoline prices increased in three areas this week: Midwest, up 31.6 cents to $2.790; Rocky Mountains, up 3.7 cents to $2.835; and the West Coast, up two tenths of a cent to $3.363. The Gulf Coast remained the same at $2.336 per gallon.