Year	Percent
1996-01-01	5.5101900000000010
1997-01-01	5.1349000000000000
1998-01-01	4.8122300000000005
1999-01-01	4.7992700000000000
2000-01-01	4.8200400000000005
2001-01-01	4.6777400000000000
2002-01-01	4.8935900000000006
2003-01-01	3.5517700000000000
2004-01-01	4.3413000000000000
2005-01-01	4.3909100000000000
2006-01-01	4.2439300000000010
2007-01-01	4.8503500000000000
2008-01-01	3.8296000000000000
2009-01-01	4.0311400000000000
2010-01-01	4.7295200000000000
2011-01-01	3.8830800000000000
2012-01-01	4.0068500000000000
2013-01-01	3.6776000000000000
2014-01-01	3.9448800000000004
2015-01-01	3.5066100000000000
2016-01-01	3.6174900000000000