Year	Percent
1996-01-01	4.4845500000000000
1997-01-01	4.0177900000000000
1998-01-01	3.6706800000000004
1999-01-01	3.0384599999999997
2000-01-01	2.9579100000000000
2001-01-01	2.4096100000000000
2002-01-01	2.7304900000000000
2003-01-01	2.9897000000000000
2004-01-01	2.6606099999999997
2005-01-01	2.7274300000000000
2006-01-01	2.8695200000000000
2007-01-01	2.5081599999999997
2008-01-01	2.7659000000000000
2009-01-01	2.5607200000000000
2010-01-01	2.4213100000000000
2011-01-01	2.3544400000000003
2012-01-01	2.4803200000000000
2013-01-01	2.3374900000000003
2014-01-01	2.3670400000000003
2015-01-01	2.4520700000000000
2016-01-01	2.5767800000000000