Year	Percent
2000-01-01	5.600
2001-01-01	5.025
2002-01-01	5.125
2003-01-01	4.975
2004-01-01	4.700
2005-01-01	4.775
2006-01-01	5.350
2007-01-01	5.300
2008-01-01	5.625
2009-01-01	7.550
2010-01-01	7.800
2011-01-01	8.050
2012-01-01	7.900
2013-01-01	7.550
2014-01-01	6.125
2015-01-01	5.350
2016-01-01	4.850
2017-01-01	4.350