Year	Percent
1996-01-01	1.9266200000000000
1997-01-01	1.4290000000000000
1998-01-01	2.2769600000000000
1999-01-01	2.0812600000000000
2000-01-01	1.8955900000000000
2001-01-01	1.9378300000000000
2002-01-01	1.7731100000000000
2003-01-01	1.8873600000000000
2004-01-01	1.8328099999999998
2005-01-01	1.8360400000000001
2006-01-01	2.3466800000000000
2007-01-01	2.3797900000000003
2008-01-01	2.1264700000000000
2009-01-01	2.1282600000000000
2010-01-01	2.1221700000000000
2011-01-01	1.8264400000000000
2012-01-01	1.8368600000000000
2013-01-01	1.6453000000000000
2014-01-01	1.7313100000000000
2015-01-01	1.7168000000000000
2016-01-01	1.7510100000000000