Year	Percent
1990-01-01	1.9702099999999998
1991-01-01	2.0743099999999997
1992-01-01	2.1519500000000000
1993-01-01	2.2878600000000000
1994-01-01	2.2944000000000000
1995-01-01	2.1633800000000000
1996-01-01	2.1698000000000000
1997-01-01	2.0638900000000002
1998-01-01	1.5924600000000000
1999-01-01	2.0619900000000000
2000-01-01	2.1677800000000000
2001-01-01	2.2592700000000000
2002-01-01	2.4193100000000000
2003-01-01	2.4707500000000000
2004-01-01	2.4590099999999997
2005-01-01	2.4312099999999996
2006-01-01	2.4383400000000000
2007-01-01	2.3764300000000000
2008-01-01	2.3318400000000000
2009-01-01	2.3258900000000002
2010-01-01	2.1913099999999996
2011-01-01	2.1850900000000000
2012-01-01	2.1720900000000003
2013-01-01	2.1212900000000000
2014-01-01	2.0384000000000000
2015-01-01	2.0402900000000000
2016-01-01	2.1466900000000000