Year	Percent
1997-01-01	5.2766400000000000
1998-01-01	5.2766400000000000
1999-01-01	5.2766400000000000
2000-01-01	6.0616300000000000
2001-01-01	5.7108099999999995
2002-01-01	5.7081700000000000
2003-01-01	4.8818600000000000
2004-01-01	4.8831900000000000
2005-01-01	4.7351900000000000
2006-01-01	2.9294599999999997
2007-01-01	3.2036900000000000
2008-01-01	2.9162000000000000
2009-01-01	0.5766770000000000
2010-01-01	2.7416200000000000
2011-01-01	2.3281300000000000
2012-01-01	1.5487200000000000
2013-01-01	3.4638199999999997
2014-01-01	2.9172000000000000
2015-01-01	3.5034800000000000
2016-01-01	2.7100800000000000