Year	Percent
2000-01-01	56.325
2001-01-01	57.075
2002-01-01	57.775
2003-01-01	58.275
2004-01-01	58.950
2005-01-01	60.775
2006-01-01	61.875
2007-01-01	66.200
2008-01-01	66.025
2009-01-01	65.300
2010-01-01	64.525
2011-01-01	64.450
2012-01-01	64.525
2013-01-01	65.325
2014-01-01	65.150
2015-01-01	65.175
2016-01-01	66.275
2017-01-01	66.625