Year	Percent
1996-01-01	5.9312500000000000
1997-01-01	5.7424300000000010
1998-01-01	6.3633400000000000
1999-01-01	5.3732500000000000
2000-01-01	5.3857200000000000
2001-01-01	5.2086400000000000
2002-01-01	5.4464900000000000
2003-01-01	5.9929100000000000
2004-01-01	5.2597600000000000
2005-01-01	5.1727099999999995
2006-01-01	5.1237300000000000
2007-01-01	4.6297400000000000
2008-01-01	4.7373000000000000
2009-01-01	5.1363100000000000
2010-01-01	4.1428199999999995
2011-01-01	4.1693000000000000
2012-01-01	3.6921199999999996
2013-01-01	3.5465400000000002
2014-01-01	2.6096100000000000
2015-01-01	3.1329300000000000
2016-01-01	2.8781100000000000