Diesel prices nationwide have fallen for seven straight weeks and for 12 of the last 13 weeks. The national average retail diesel price fell 1.7 cents to $3.894 a gallon during the week ended Jan. 14, according to the U.S. Department of Energy’s Energy Information Administration. The latest weekly price is 4 cents above the same week last year.

Diesel prices dropped in all but two regions — New England and California. The largest drop was 3.6 cents in the Midwest. The increase in both New England and California was 1.5 cents. New England is home to the nation’s most expensive diesel on average at $4.168 a gallon. The Rocky Mountain region has the nation’s least expensive diesel on average at $3.661 a gallon.

Complete diesel price information is available on EIA’s Website.