Year	Percent
1996-01-01	62.317900000000000
1997-01-01	59.867500000000000
1998-01-01	61.826000000000000
1999-01-01	60.110100000000000
2000-01-01	60.525000000000000
2001-01-01	58.739600000000000
2002-01-01	55.986100000000000
2003-01-01	56.257400000000000
2004-01-01	58.378800000000000
2005-01-01	57.943000000000005
2006-01-01	58.269800000000000
2007-01-01	61.593900000000000
2008-01-01	63.645500000000000
2009-01-01	58.041100000000000
2010-01-01	58.184400000000000
2011-01-01	60.695700000000000
2012-01-01	60.968000000000000
2013-01-01	60.023700000000000
2014-01-01	61.157200000000000