Year	Percent
2005-01-01	49.900
2006-01-01	50.800
2007-01-01	52.275
2008-01-01	53.225
2009-01-01	53.450
2010-01-01	53.675
2011-01-01	54.350
2012-01-01	55.600
2013-01-01	56.675
2014-01-01	57.975
2015-01-01	59.500
2016-01-01	61.550
2017-01-01	63.225