Year	Percent
2000-01-01	2.350
2001-01-01	1.825
2002-01-01	2.450
2003-01-01	3.500
2004-01-01	4.375
2005-01-01	4.475
2006-01-01	3.575
2007-01-01	2.825
2008-01-01	2.475
2009-01-01	3.400
2010-01-01	4.450
2011-01-01	4.625
2012-01-01	5.525
2013-01-01	7.250
2014-01-01	7.200
2015-01-01	6.575
2016-01-01	5.650
2017-01-01	4.500