Year	Percent
1998-01-01	20.4000
1999-01-01	20.8000
2000-01-01	10.6000
2001-01-01	10.6000
2002-01-01	10.6000
2003-01-01	14.5000
2004-01-01	14.0000
2005-01-01	15.3000
2006-01-01	16.9000
2007-01-01	16.9000
2008-01-01	16.9000
2009-01-01	18.8000
2010-01-01	17.6708
2011-01-01	15.6128
2012-01-01	17.1218
2013-01-01	13.6112
2014-01-01	14.6718
2015-01-01	13.2849
2016-01-01	16.6620