Year	Percent
1999-01-01	3.625
2000-01-01	3.575
2001-01-01	3.500
2002-01-01	3.575
2003-01-01	3.875
2004-01-01	5.225
2005-01-01	5.275
2006-01-01	5.150
2007-01-01	4.700
2008-01-01	3.850
2009-01-01	4.500
2010-01-01	4.175
2011-01-01	4.100
2012-01-01	4.300
2013-01-01	4.800
2014-01-01	4.975
2015-01-01	4.875
2016-01-01	5.125
2017-01-01	4.725