Year	Percent
2000-01-01	2.600
2001-01-01	2.550
2002-01-01	2.500
2003-01-01	2.500
2004-01-01	2.550
2005-01-01	2.800
2006-01-01	2.425
2007-01-01	2.475
2008-01-01	3.425
2009-01-01	6.525
2010-01-01	8.700
2011-01-01	9.625
2012-01-01	10.525
2013-01-01	10.800
2014-01-01	9.525
2015-01-01	7.725
2016-01-01	6.400
2017-01-01	5.750