Year	Percent
2005-01-01	77.025
2006-01-01	78.100
2007-01-01	79.000
2008-01-01	79.425
2009-01-01	78.025
2010-01-01	77.700
2011-01-01	77.650
2012-01-01	77.300
2013-01-01	76.850
2014-01-01	77.425
2015-01-01	78.000
2016-01-01	78.725
2017-01-01	79.650