Year	Percent
1999-01-01	5.625
2000-01-01	5.000
2001-01-01	4.500
2002-01-01	4.850
2003-01-01	5.050
2004-01-01	5.625
2005-01-01	6.775
2006-01-01	7.350
2007-01-01	7.325
2008-01-01	7.400
2009-01-01	9.050
2010-01-01	10.125
2011-01-01	10.450
2012-01-01	9.700
2013-01-01	9.150
2014-01-01	7.150
2015-01-01	6.550
2016-01-01	4.550
2017-01-01	4.025