Year	Percent
1998-01-01	11.8000
1999-01-01	12.5000
2000-01-01	12.5000
2001-01-01	13.0000
2002-01-01	13.2000
2003-01-01	13.8000
2004-01-01	14.4000
2005-01-01	13.7000
2006-01-01	14.7000
2007-01-01	14.8000
2008-01-01	16.1000
2009-01-01	18.2000
2010-01-01	17.4503
2011-01-01	17.6993
2012-01-01	17.6370
2013-01-01	14.5799
2014-01-01	15.3565
2015-01-01	16.2807
2016-01-01	16.4775