Year	Percent
1996-01-01	2.5685900000000000
1997-01-01	2.6135200000000003
1998-01-01	2.2468300000000000
1999-01-01	2.5235500000000000
2000-01-01	2.3874299999999997
2001-01-01	2.1576299999999997
2002-01-01	2.0342500000000000
2003-01-01	2.3881099999999997
2004-01-01	2.5256300000000000
2005-01-01	2.5805200000000000
2006-01-01	2.4462500000000000
2007-01-01	2.4439500000000000
2008-01-01	2.0905099999999996
2009-01-01	2.2925299999999997
2010-01-01	2.7183599999999997
2011-01-01	2.4250599999999998
2012-01-01	2.4268500000000000
2013-01-01	2.3930100000000000
2014-01-01	2.0847700000000002
2015-01-01	2.1093900000000003
2016-01-01	2.3860799999999998