Year	Percent
2000-01-01	53.92789
2001-01-01	57.09737
2002-01-01	57.94961
2003-01-01	58.83635
2004-01-01	59.63892
2005-01-01	63.69525
2006-01-01	65.55170
2007-01-01	67.86887
2008-01-01	67.32670
2009-01-01	67.11897
2010-01-01	64.75153