Year	Percent
1998-01-01	10.6000
1999-01-01	11.7000
2000-01-01	11.9000
2001-01-01	12.3000
2002-01-01	12.4000
2003-01-01	13.4000
2004-01-01	13.3000
2005-01-01	12.9000
2006-01-01	15.4000
2007-01-01	14.8000
2008-01-01	12.2000
2009-01-01	14.7000
2010-01-01	15.6000
2011-01-01	15.9000
2012-01-01	16.2000
2013-01-01	14.3000
2014-01-01	14.2000
2015-01-01	14.2000
2016-01-01	14.7496