Year	Percent
2000-01-01	52.950
2001-01-01	54.100
2002-01-01	55.275
2003-01-01	57.150
2004-01-01	57.775
2005-01-01	58.400
2006-01-01	59.100
2007-01-01	59.250
2008-01-01	59.825
2009-01-01	60.275
2010-01-01	60.000
2011-01-01	59.675
2012-01-01	61.100
2013-01-01	62.825
2014-01-01	63.550
2015-01-01	64.425
2016-01-01	65.775
2017-01-01	66.450