Year	Percent
1998-01-01	1.4000000000000000
1999-01-01	1.7000000000000000
2000-01-01	1.0000000000000000
2001-01-01	1.3000000000000000
2002-01-01	0.8000000000000000
2003-01-01	0.4000000000000000
2004-01-01	0.3000000000000000
2005-01-01	0.2000000000000000
2006-01-01	0.2000000000000000
2007-01-01	0.5000000000000000
2008-01-01	1.9000000000000000
2009-01-01	5.2000000000000000
2010-01-01	5.3754900000000000
2011-01-01	4.0453100000000000
2012-01-01	2.6226700000000003
2013-01-01	1.4746200000000000
2014-01-01	1.3882400000000000
2015-01-01	0.9818740000000000
2016-01-01	0.8697680000000000