Year	Percent
2000-01-01	2.950
2001-01-01	2.225
2002-01-01	2.750
2003-01-01	3.700
2004-01-01	4.575
2005-01-01	4.750
2006-01-01	3.900
2007-01-01	3.200
2008-01-01	2.700
2009-01-01	3.425
2010-01-01	4.475
2011-01-01	5.025
2012-01-01	5.875
2013-01-01	7.325
2014-01-01	7.475
2015-01-01	6.950
2016-01-01	6.100
2017-01-01	4.850