Year	Percent
1990-01-01	2.6134200000000000
1991-01-01	2.8613000000000000
1992-01-01	2.9089500000000000
1993-01-01	2.7710900000000000
1994-01-01	2.7295400000000000
1995-01-01	2.6052700000000000
1996-01-01	2.4867100000000000
1997-01-01	2.2707700000000000
1998-01-01	2.1353700000000000
1999-01-01	2.2405100000000000
2000-01-01	2.4148900000000000
2001-01-01	2.5624300000000000
2002-01-01	2.5528800000000000
2003-01-01	2.6237200000000000
2004-01-01	2.2910800000000000
2005-01-01	2.2022900000000000
2006-01-01	2.2371600000000000
2007-01-01	2.3442600000000000
2008-01-01	2.2571800000000000
2009-01-01	2.4658500000000000
2010-01-01	2.4656300000000000
2011-01-01	2.2569200000000000
2012-01-01	2.2766800000000000
2013-01-01	2.1686900000000002
2014-01-01	2.0765700000000002
2015-01-01	1.9946000000000000