Year	Percent
1998-01-01	0.7000000000000000
1999-01-01	0.6000000000000000
2000-01-01	0.5000000000000000
2001-01-01	0.6000000000000000
2002-01-01	0.4000000000000000
2003-01-01	0.3000000000000000
2004-01-01	0.2000000000000000
2005-01-01	0.6000000000000000
2006-01-01	0.6000000000000000
2007-01-01	0.6000000000000000
2008-01-01	1.3000000000000000
2009-01-01	2.0000000000000000
2010-01-01	2.1490000000000000
2011-01-01	1.9680000000000002
2012-01-01	1.7469999999999999
2013-01-01	1.3990000000000000
2014-01-01	1.0470000000000000
2015-01-01	0.9240000000000000
2016-01-01	0.9790000000000001