Year	Percent
1998-01-01	12.5000
1999-01-01	13.5000
2000-01-01	13.3000
2001-01-01	12.7000
2002-01-01	14.0000
2003-01-01	14.1000
2004-01-01	13.6000
2005-01-01	13.0000
2006-01-01	12.5000
2007-01-01	12.2000
2008-01-01	12.5000
2009-01-01	14.3000
2010-01-01	14.1384
2011-01-01	13.9346
2012-01-01	13.3121
2013-01-01	13.3244
2014-01-01	13.3851
2015-01-01	12.6204
2016-01-01	13.7798