Year	Percent
2000-01-01	52.700
2001-01-01	52.700
2002-01-01	53.275
2003-01-01	54.925
2004-01-01	54.000
2005-01-01	56.525
2006-01-01	57.250
2007-01-01	58.975
2008-01-01	64.725
2009-01-01	59.275
2010-01-01	51.925
2011-01-01	57.150
2012-01-01	59.150
2013-01-01	61.425
2014-01-01	65.150
2015-01-01	63.075
2016-01-01	63.750
2017-01-01	66.575