Year	Percent
1996-01-01	2.9884300000000000
1997-01-01	2.8783300000000000
1998-01-01	2.7097500000000000
1999-01-01	2.7657000000000000
2000-01-01	2.5883800000000000
2001-01-01	2.6928300000000000
2002-01-01	2.3028299999999997
2003-01-01	2.3808599999999998
2004-01-01	2.5025700000000000
2005-01-01	2.2922700000000003
2006-01-01	2.2766200000000000
2007-01-01	2.1541799999999998
2008-01-01	2.0462800000000000
2009-01-01	1.6697300000000000
2010-01-01	1.8862599999999998
2011-01-01	1.8871600000000000
2012-01-01	1.6664100000000000
2013-01-01	1.7294900000000002
2014-01-01	1.7210400000000001
2015-01-01	1.7474400000000000
2016-01-01	1.7469900000000000