Year	Percent
2003-01-01	54.200
2004-01-01	55.000
2005-01-01	55.600
2006-01-01	55.000
2007-01-01	55.900
2008-01-01	56.025
2009-01-01	58.175
2010-01-01	57.700
2011-01-01	57.575
2012-01-01	58.750
2013-01-01	59.400
2014-01-01	60.100
2015-01-01	59.975
2016-01-01	58.900
2017-01-01	59.300