Year	Percent
2005-01-01	44.275
2006-01-01	45.075
2007-01-01	45.800
2008-01-01	46.300
2009-01-01	45.850
2010-01-01	45.600
2011-01-01	45.625
2012-01-01	45.600
2013-01-01	45.575
2014-01-01	45.975
2015-01-01	46.425
2016-01-01	47.075
2017-01-01	47.725