Year	Percent
1996-01-01	3.3151200000000000
1997-01-01	3.1042799999999997
1998-01-01	3.8491500000000000
1999-01-01	3.5734900000000000
2000-01-01	3.3738300000000003
2001-01-01	3.0868300000000000
2002-01-01	2.8932300000000000
2003-01-01	2.8185200000000000
2004-01-01	2.9100599999999996
2005-01-01	2.8789599999999997
2006-01-01	3.3391800000000003
2007-01-01	3.4823100000000000
2008-01-01	3.3257400000000000
2009-01-01	3.2504400000000000
2010-01-01	3.0552599999999996
2011-01-01	2.8563900000000000
2012-01-01	2.8996500000000000
2013-01-01	3.0363400000000000
2014-01-01	3.0062400000000000
2015-01-01	2.4734400000000000
2016-01-01	2.4116200000000000