Year	Percent
2003-01-01	2.600
2004-01-01	3.300
2005-01-01	2.900
2006-01-01	2.700
2007-01-01	2.850
2008-01-01	3.800
2009-01-01	3.475
2010-01-01	3.000
2011-01-01	3.300
2012-01-01	3.775
2013-01-01	4.575
2014-01-01	4.650
2015-01-01	4.975
2016-01-01	4.950
2017-01-01	4.825