The average price of a gallon of regular gasoline nationwide went down slightly in the past week again.  Gas went down from $2.01 per gallon to $2.00, while it was at $2.50 per gallon one year ago.  There was an increase in Illinois though for the past week, as it went up from $1.94 per gallon of regular gas to $2.00.  It remained at $1.79 per gallon of regular gas in Nashville again this past week.