Year	Percent
1998-01-01	4.20000
1999-01-01	4.70000
2000-01-01	4.70000
2001-01-01	4.60000
2002-01-01	4.60000
2003-01-01	4.70000
2004-01-01	5.60000
2005-01-01	4.70000
2006-01-01	4.10000
2007-01-01	3.70000
2008-01-01	3.50000
2009-01-01	4.50000
2010-01-01	4.70000
2011-01-01	4.90000
2012-01-01	4.90000
2013-01-01	5.00000
2014-01-01	4.90000
2015-01-01	5.10000
2016-01-01	5.16064