Year	Percent
2000-01-01	73.150
2001-01-01	73.500
2002-01-01	73.650
2003-01-01	73.800
2004-01-01	74.175
2005-01-01	74.750
2006-01-01	74.575
2007-01-01	74.575
2008-01-01	75.100
2009-01-01	74.575
2010-01-01	74.275
2011-01-01	74.400
2012-01-01	74.475
2013-01-01	75.100
2014-01-01	76.225
2015-01-01	76.550
2016-01-01	77.025
2017-01-01	78.075