Year	Percent
2000-01-01	70.850
2001-01-01	72.525
2002-01-01	73.600
2003-01-01	74.375
2004-01-01	74.650
2005-01-01	75.475
2006-01-01	77.000
2007-01-01	78.725
2008-01-01	80.525
2009-01-01	80.650
2010-01-01	79.325
2011-01-01	78.075
2012-01-01	78.075
2013-01-01	77.475
2014-01-01	76.500
2015-01-01	76.975
2016-01-01	77.750
2017-01-01	78.600