Month	2011	2010	2009
January	2.00	2.72	2.58
February	2.00	2.72	2.58
March	2.87	2.72	2.58
April	2.87	2.72	2.58
May	2.87	2.72	2.58
June	2.87	2.72	2.64
July		2.72	2.64
August	2.65	2.72	2.64
September		2.72	2.64
October		2.50	2.64
November		2.50	2.72
December		2.50	2.72