Year	Percent
1996-01-01	3.7404900000000003
1997-01-01	3.9860000000000000
1998-01-01	3.7441900000000000
1999-01-01	3.8028800000000005
2000-01-01	3.9278800000000005
2001-01-01	3.9426400000000004
2002-01-01	3.8895000000000000
2003-01-01	3.8809099999999996
2004-01-01	3.7298600000000000
2005-01-01	3.4879200000000000
2006-01-01	3.4223600000000000
2007-01-01	3.1873500000000000
2008-01-01	3.0427500000000000
2009-01-01	3.0567000000000000
2010-01-01	2.7394300000000000
2011-01-01	2.7228800000000000
2012-01-01	2.6617599999999997
2013-01-01	2.6076000000000000
2014-01-01	2.6610099999999997
2015-01-01	3.4730000000000003
2016-01-01	3.3635699999999997