The average price of a gallon of regular gasoline nationwide went down in the past week again.  Gas went down from $2.04 per gallon to $2.01, while it was at $2.56 per gallon one year ago.  There was small decrease in Illinois as well for the past week, as it went down from $1.96 per gallon of regular gas to $1.94.  It was also down in Nashville going from $1.89 per gallon of regular gas to $1.79 per gallon.