Year	Percent
1998-01-01	9.9000
1999-01-01	10.0000
2000-01-01	8.8000
2001-01-01	8.8000
2002-01-01	8.8000
2003-01-01	8.8000
2004-01-01	8.8000
2005-01-01	8.8000
2006-01-01	9.6000
2007-01-01	9.7000
2008-01-01	10.9000
2009-01-01	10.8000
2010-01-01	10.5601
2011-01-01	10.5068
2012-01-01	10.7820
2013-01-01	10.6223
2014-01-01	10.8509
2015-01-01	10.4942
2016-01-01	10.3779