Year	Percent
1999-01-01	4.350
2000-01-01	3.900
2001-01-01	4.175
2002-01-01	3.800
2003-01-01	4.500
2004-01-01	5.550
2005-01-01	4.625
2006-01-01	3.550
2007-01-01	2.975
2008-01-01	2.425
2009-01-01	4.750
2010-01-01	6.675
2011-01-01	6.625
2012-01-01	5.650
2013-01-01	5.225
2014-01-01	5.075
2015-01-01	3.975
2016-01-01	3.975
2017-01-01	3.850