WASHINGTON, D.C. --- Retail gasoline prices continued their steady decline, falling 6.4 cents to $2.165 per gallon for Jan. 22, according to the weekly survey from the Energy Department's Energy Information Administration (EIA). Prices are 17.1 cents per gallon lower than at this time last year. East Coast prices fell 5.9 cents to $2.203 per gallon. For the third consecutive week, the Midwest saw the largest regional decrease, with prices falling 8.5 cents to $1.992 per gallon. Prices there are now 29.0 cents per gallon lower than at this time last year, the EIA reported. Gulf Coast prices dipped 5.7 cents to $2.054 per gallon, while Rocky Mountain prices fell 4.1 cents to $2.158 per gallon. Prices for the West Coast were down 4.5 cents to $2.509 per gallon, but remain 12.3 cents per gallon higher than at this time last year. Retail diesel fuel prices were also lower this week, decreasing 3.3 cents to $2.43 per gallon. Prices are 4.2 cents lower than at this time last year. All regions reported decreases. East Coast diesel prices fell 1.6 cents to $2.421 per gallon. Midwest prices dropped 3.7 cents to $2.371 per gallon. The Gulf Coast saw a decrease of 3.0 cents to $2.361 per gallon, while Rocky Mountain diesel prices fell 3.9 cents to $2.586 per gallon. Diesel prices on the West Coast saw the largest decrease, falling 5.4 cents to $2.695 per gallon. Prices are still 8.7 cents per gallon higher than at this time last year.