Surcharge	Effective Date
15.50 %	Feb. 6, 2012 - Mar. 4, 2012
17.00 %	Jan. 2, 2012 - Feb. 5, 2012
18.00 %	Dec. 5, 2011 - Jan. 1, 2012
18.00 %	Nov. 7, 2011 - Dec. 4, 2011