Year	Percent
1998-01-01	1.5000000000000000
1999-01-01	1.7000000000000000
2000-01-01	1.7000000000000000
2001-01-01	1.6000000000000000
2002-01-01	1.8000000000000000
2003-01-01	1.6000000000000000
2004-01-01	1.2000000000000000
2005-01-01	0.9000000000000000
2006-01-01	0.7000000000000000
2007-01-01	0.8000000000000000
2008-01-01	1.0000000000000000
2009-01-01	2.9000000000000000
2010-01-01	2.6932800000000000
2011-01-01	2.3464600000000000
2012-01-01	2.1571500000000000
2013-01-01	2.1054300000000000
2014-01-01	2.0596600000000000
2015-01-01	1.8746599999999998
2016-01-01	1.8326400000000000