Year	Percent
1996-01-01	4.7639500000000000
1997-01-01	4.6727200000000000
1998-01-01	4.0605100000000000
1999-01-01	3.9224300000000003
2000-01-01	3.9809800000000000
2001-01-01	3.9393300000000004
2002-01-01	5.2243900000000005
2003-01-01	5.5146000000000000
2004-01-01	4.8977100000000000
2005-01-01	4.1199500000000000
2006-01-01	3.3009900000000000
2007-01-01	3.2956300000000005
2008-01-01	3.2467200000000003
2009-01-01	3.7077000000000000
2010-01-01	3.7277500000000000
2011-01-01	3.8902500000000000
2012-01-01	4.1236300000000000
2013-01-01	4.2189999999999990
2014-01-01	4.3704199999999990
2015-01-01	4.0968900000000000
2016-01-01	4.3883900000000000