Year	Percent
2003-01-01	50.125
2004-01-01	50.325
2005-01-01	50.450
2006-01-01	50.525
2007-01-01	50.900
2008-01-01	51.100
2009-01-01	51.425
2010-01-01	51.450
2011-01-01	51.350
2012-01-01	51.525
2013-01-01	51.725
2014-01-01	51.625
2015-01-01	51.625
2016-01-01	51.625
2017-01-01	51.400