Year	Percent
2005-01-01	37.575
2006-01-01	40.300
2007-01-01	43.400
2008-01-01	46.000
2009-01-01	48.600
2010-01-01	50.700
2011-01-01	53.225
2012-01-01	54.950
2013-01-01	57.650
2014-01-01	59.975
2015-01-01	61.200
2016-01-01	63.550
2017-01-01	65.375