Year	Percent
2000-01-01	59.400
2001-01-01	58.750
2002-01-01	58.175
2003-01-01	58.950
2004-01-01	58.900
2005-01-01	58.750
2006-01-01	60.650
2007-01-01	60.550
2008-01-01	61.100
2009-01-01	60.700
2010-01-01	60.525
2011-01-01	61.300
2012-01-01	61.325
2013-01-01	61.325
2014-01-01	61.100
2015-01-01	62.125
2016-01-01	62.875
2017-01-01	63.650