Year	Percent
1996-01-01	3.8315400000000000
1997-01-01	3.6522400000000000
1998-01-01	3.6319700000000000
1999-01-01	3.9984300000000004
2000-01-01	3.5163400000000000
2001-01-01	3.3949900000000000
2002-01-01	3.3326300000000004
2003-01-01	3.2614300000000000
2004-01-01	3.1283500000000000
2005-01-01	3.0651800000000000
2006-01-01	2.8982700000000000
2007-01-01	2.8737600000000000
2008-01-01	2.7883100000000000
2009-01-01	2.8640000000000000
2010-01-01	2.9285099999999997
2011-01-01	2.8644900000000000
2012-01-01	2.8746800000000000
2013-01-01	2.7351500000000000
2014-01-01	2.7202200000000000
2015-01-01	2.5804400000000003
2016-01-01	2.5160200000000000