Year	Percent
2000-01-01	2.350
2001-01-01	2.600
2002-01-01	2.875
2003-01-01	3.350
2004-01-01	3.475
2005-01-01	3.725
2006-01-01	2.925
2007-01-01	1.900
2008-01-01	1.900
2009-01-01	2.400
2010-01-01	2.950
2011-01-01	2.700
2012-01-01	2.575
2013-01-01	2.900
2014-01-01	3.300
2015-01-01	4.025
2016-01-01	4.300
2017-01-01	3.725