Year	Percent
2005-01-01	33.600
2006-01-01	34.850
2007-01-01	35.800
2008-01-01	36.725
2009-01-01	37.700
2010-01-01	38.500
2011-01-01	40.000
2012-01-01	41.675
2013-01-01	43.300
2014-01-01	45.150
2015-01-01	46.850
2016-01-01	48.900
2017-01-01	50.850