Year	Percent
2000-01-01	50.725
2001-01-01	51.325
2002-01-01	51.800
2003-01-01	53.075
2004-01-01	53.850
2005-01-01	55.825
2006-01-01	58.100
2007-01-01	58.700
2008-01-01	58.800
2009-01-01	55.725
2010-01-01	53.925
2011-01-01	56.300
2012-01-01	57.875
2013-01-01	58.825
2014-01-01	59.125
2015-01-01	61.350
2016-01-01	62.075
2017-01-01	63.700