Year	Percent
2000-01-01	3.350
2001-01-01	3.525
2002-01-01	3.800
2003-01-01	4.100
2004-01-01	4.225
2005-01-01	4.425
2006-01-01	3.450
2007-01-01	2.525
2008-01-01	2.575
2009-01-01	3.150
2010-01-01	3.600
2011-01-01	3.300
2012-01-01	3.200
2013-01-01	3.525
2014-01-01	3.575
2015-01-01	4.450
2016-01-01	4.800
2017-01-01	4.250