Year	Percent
2000-01-01	59.175
2001-01-01	56.925
2002-01-01	58.450
2003-01-01	59.475
2004-01-01	60.250
2005-01-01	60.525
2006-01-01	62.450
2007-01-01	63.475
2008-01-01	63.475
2009-01-01	61.925
2010-01-01	60.725
2011-01-01	61.300
2012-01-01	61.450
2013-01-01	61.600
2014-01-01	61.275
2015-01-01	61.600
2016-01-01	60.225
2017-01-01	60.300