Year	Percent
2003-01-01	50.900
2004-01-01	51.900
2005-01-01	53.700
2006-01-01	54.600
2007-01-01	56.100
2008-01-01	55.150
2009-01-01	56.975
2010-01-01	57.200
2011-01-01	56.925
2012-01-01	59.025
2013-01-01	59.125
2014-01-01	60.525
2015-01-01	60.775
2016-01-01	60.425
2017-01-01	62.550