Year	Percent
1998-01-01	11.6000
1999-01-01	11.2000
2000-01-01	11.1000
2001-01-01	11.4000
2002-01-01	12.0000
2003-01-01	12.7000
2004-01-01	12.9000
2005-01-01	12.8000
2006-01-01	12.3000
2007-01-01	12.3000
2008-01-01	13.0000
2009-01-01	14.3000
2010-01-01	15.1945
2011-01-01	13.0524
2012-01-01	13.1270
2013-01-01	12.3182
2014-01-01	12.4767
2015-01-01	12.6846
2016-01-01	12.9726