Year	Percent
2005-01-01	74.300
2006-01-01	74.700
2007-01-01	75.000
2008-01-01	76.600
2009-01-01	77.100
2010-01-01	75.275
2011-01-01	76.275
2012-01-01	76.700
2013-01-01	77.075
2014-01-01	78.050
2015-01-01	78.625
2016-01-01	79.500
2017-01-01	79.350