Year	Percent
2003-01-01	57.800
2004-01-01	58.500
2005-01-01	59.100
2006-01-01	59.100
2007-01-01	59.825
2008-01-01	59.600
2009-01-01	61.350
2010-01-01	60.975
2011-01-01	60.625
2012-01-01	62.225
2013-01-01	62.775
2014-01-01	63.525
2015-01-01	64.775
2016-01-01	63.700
2017-01-01	63.450