For the first time in over a month, the nation’s average price of gasoline has declined, falling 4.0 cents from a week ago to $3.78 per gallon yesterday according to GasBuddy data compiled from more than 11 million individual price reports covering over 150,000 gas stations across the country. The national average is up 5.8 cents from a month ago but 3.5 cents per gallon lower than a year ago. The national average price of diesel has risen 3.3 cents in the last week and stands at $4.333 per gallon, 70.7 cents lower than one year ago.