Year	Percent
1998-01-01	11.5000
1999-01-01	18.1000
2000-01-01	19.0000
2001-01-01	20.3000
2002-01-01	19.1000
2003-01-01	19.1000
2004-01-01	17.0000
2005-01-01	16.0000
2006-01-01	14.9000
2007-01-01	15.5000
2008-01-01	16.8000
2009-01-01	20.9000
2010-01-01	18.0867
2011-01-01	14.6595
2012-01-01	13.6937
2013-01-01	13.4626
2014-01-01	12.4942
2015-01-01	12.7034
2016-01-01	13.0721