Year	Percent
1996-01-01	5.1365400000000000
1997-01-01	4.8941700000000000
1998-01-01	4.4323600000000000
1999-01-01	6.7243500000000000
2000-01-01	4.2306900000000000
2001-01-01	4.2211500000000000
2002-01-01	4.9296700000000000
2003-01-01	5.0005400000000000
2004-01-01	2.7403500000000000
2005-01-01	5.0713300000000010
2006-01-01	1.2529800000000000
2007-01-01	4.1553600000000000
2008-01-01	4.0275600000000000
2009-01-01	5.7950500000000000
2010-01-01	4.9315100000000000
2011-01-01	4.4619400000000000
2012-01-01	4.2238500000000000
2013-01-01	3.8020699999999996
2014-01-01	3.6183099999999997
2015-01-01	3.8119099999999997
2016-01-01	4.1821900000000000