Year	Percent
2000-01-01	5.025
2001-01-01	4.400
2002-01-01	4.500
2003-01-01	4.325
2004-01-01	4.250
2005-01-01	4.300
2006-01-01	4.950
2007-01-01	4.975
2008-01-01	5.100
2009-01-01	6.450
2010-01-01	6.900
2011-01-01	7.350
2012-01-01	7.400
2013-01-01	7.050
2014-01-01	5.850
2015-01-01	5.150
2016-01-01	4.700
2017-01-01	4.250