Year	Percent
1996-01-01	2.1741200000000003
1997-01-01	1.5240500000000000
1998-01-01	1.9777000000000000
1999-01-01	2.8497900000000000
2000-01-01	2.3437000000000000
2001-01-01	1.4552700000000000
2002-01-01	2.1083700000000000
2003-01-01	2.3103400000000000
2004-01-01	4.0676600000000000
2005-01-01	2.9566400000000000
2006-01-01	4.8102500000000000
2007-01-01	1.9026599999999998
2008-01-01	1.7098400000000002
2009-01-01	2.0581400000000003
2010-01-01	4.9775300000000010
2011-01-01	2.6657500000000000
2012-01-01	2.5108099999999998
2013-01-01	2.2331100000000000
2014-01-01	2.0597500000000000
2015-01-01	1.5191000000000000
2016-01-01	1.8640500000000000