Year	Percent
2003-01-01	43.700
2004-01-01	45.400
2005-01-01	46.300
2006-01-01	49.400
2007-01-01	50.375
2008-01-01	48.050
2009-01-01	49.900
2010-01-01	49.775
2011-01-01	50.250
2012-01-01	51.900
2013-01-01	52.475
2014-01-01	53.450
2015-01-01	54.550
2016-01-01	53.500
2017-01-01	54.975