Year	Percent
1999-01-01	4.350
2000-01-01	3.025
2001-01-01	3.225
2002-01-01	3.950
2003-01-01	2.725
2004-01-01	3.225
2005-01-01	3.850
2006-01-01	4.250
2007-01-01	3.525
2008-01-01	3.575
2009-01-01	5.025
2010-01-01	4.225
2011-01-01	3.900
2012-01-01	4.050
2013-01-01	5.500
2014-01-01	5.525
2015-01-01	6.350
2016-01-01	5.350
2017-01-01	5.300