Year	Percent
1996-01-01	4.1716200000000000
1997-01-01	4.1809300000000000
1998-01-01	3.8093600000000000
1999-01-01	4.3161700000000000
2000-01-01	3.8292599999999997
2001-01-01	3.8303599999999998
2002-01-01	3.9454800000000003
2003-01-01	3.7104100000000000
2004-01-01	3.5059099999999996
2005-01-01	3.4720100000000000
2006-01-01	3.2110600000000000
2007-01-01	3.1353100000000000
2008-01-01	3.0992900000000003
2009-01-01	3.4118000000000000
2010-01-01	3.8111300000000004
2011-01-01	3.6401100000000000
2012-01-01	3.5251400000000000
2013-01-01	3.4276500000000000
2014-01-01	3.4611800000000000
2015-01-01	3.3353300000000004
2016-01-01	3.3264000000000000