Year	Percent
1991-01-01	1.3281399999999999
1992-01-01	1.3723500000000000
1993-01-01	1.5237399999999999
1994-01-01	1.6941000000000000
1995-01-01	1.9469400000000001
1996-01-01	1.6841599999999999
1997-01-01	1.7578500000000000
1998-01-01	1.6544100000000000
1999-01-01	1.5472500000000000
2000-01-01	1.8040500000000000
2001-01-01	1.7293100000000000
2002-01-01	1.7775400000000001
2003-01-01	1.6790700000000000
2004-01-01	1.6719900000000000
2005-01-01	1.6315800000000000
2006-01-01	1.5869600000000000
2007-01-01	1.6064100000000001
2008-01-01	1.6365900000000000
2009-01-01	1.6877900000000001
2010-01-01	1.5812800000000000
2011-01-01	1.5172700000000001
2012-01-01	1.6916900000000001
2013-01-01	1.7597099999999999
2014-01-01	1.5927799999999999
2015-01-01	1.4326800000000000
2016-01-01	1.3911799999999999