Year	Percent
2003-01-01	56.300
2004-01-01	54.600
2005-01-01	53.700
2006-01-01	50.600
2007-01-01	49.625
2008-01-01	51.950
2009-01-01	50.100
2010-01-01	50.225
2011-01-01	49.750
2012-01-01	48.100
2013-01-01	47.525
2014-01-01	46.550
2015-01-01	45.450
2016-01-01	46.500
2017-01-01	45.025