Year	Percent
1999-01-01	4.875
2000-01-01	4.250
2001-01-01	4.025
2002-01-01	4.150
2003-01-01	4.900
2004-01-01	5.075
2005-01-01	4.100
2006-01-01	3.150
2007-01-01	3.125
2008-01-01	2.650
2009-01-01	5.200
2010-01-01	6.575
2011-01-01	6.625
2012-01-01	6.700
2013-01-01	6.275
2014-01-01	5.850
2015-01-01	5.725
2016-01-01	5.525
2017-01-01	5.225