Year	Percent
2000-01-01	67.24860
2001-01-01	70.09523
2002-01-01	70.31303
2003-01-01	69.67407
2004-01-01	68.98589
2005-01-01	68.52676
2006-01-01	68.73873
2007-01-01	69.85625
2008-01-01	68.60397
2009-01-01	62.00692
2010-01-01	54.85745