The average price of a gallon of regular gasoline nationwide went up ever so slightly in the past week, as it was at $2.39 per gallon, but increased to $2.40, while it was at $3.65 per gallon one year ago.  There was no change in Illinois for the past week, as it remained at $2.54 per gallon of regular gas.  It was unchanged in Nashville this past week also, remaining at $2.35 per gallon.