Year	Percent
2000-01-01	56.925
2001-01-01	58.500
2002-01-01	59.450
2003-01-01	59.325
2004-01-01	59.175
2005-01-01	59.625
2006-01-01	60.725
2007-01-01	62.475
2008-01-01	63.800
2009-01-01	64.025
2010-01-01	61.950
2011-01-01	61.250
2012-01-01	61.325
2013-01-01	60.575
2014-01-01	59.600
2015-01-01	60.350
2016-01-01	60.875
2017-01-01	61.875