Year	Percent
1996-01-01	2.5553200000000000
1997-01-01	2.0924099999999997
1998-01-01	1.9718300000000000
1999-01-01	1.7511100000000000
2000-01-01	1.6979700000000000
2001-01-01	1.5694500000000000
2002-01-01	1.8168000000000000
2003-01-01	1.6552500000000000
2004-01-01	1.5524000000000000
2005-01-01	1.5016800000000000
2006-01-01	1.6491099999999999
2007-01-01	1.6406000000000000
2008-01-01	1.6710500000000000
2009-01-01	1.5680300000000000
2010-01-01	1.4667000000000000
2011-01-01	1.4390600000000000
2012-01-01	1.4943000000000000
2013-01-01	1.4594200000000002
2014-01-01	1.4532900000000000
2015-01-01	1.4340600000000001
2016-01-01	1.6187000000000000