Year	Percent
2000-01-01	75.125
2001-01-01	75.800
2002-01-01	76.550
2003-01-01	76.475
2004-01-01	76.600
2005-01-01	76.900
2006-01-01	77.375
2007-01-01	78.475
2008-01-01	79.350
2009-01-01	79.700
2010-01-01	78.175
2011-01-01	78.075
2012-01-01	79.025
2013-01-01	79.375
2014-01-01	79.025
2015-01-01	79.625
2016-01-01	79.675
2017-01-01	79.750