Year	Percent
1990-01-01	2.0971599999999997
1991-01-01	2.0264800000000000
1992-01-01	2.0945099999999996
1993-01-01	2.2730300000000000
1994-01-01	2.3818900000000003
1995-01-01	2.4453600000000000
1996-01-01	2.5314200000000002
1997-01-01	2.6086900000000000
1998-01-01	2.6704100000000000
1999-01-01	2.8476000000000000
2000-01-01	2.8968500000000000
2001-01-01	2.8741600000000000
2002-01-01	2.9597300000000000
2003-01-01	3.0930299999999997
2004-01-01	3.1021200000000000
2005-01-01	3.2746299999999997
2006-01-01	3.2755300000000000
2007-01-01	3.1433299999999997
2008-01-01	3.1108400000000000
2009-01-01	3.4700400000000000
2010-01-01	3.5071900000000000
2011-01-01	3.2158900000000004
2012-01-01	3.2636500000000000
2013-01-01	3.2328000000000000
2014-01-01	3.2259900000000004
2015-01-01	3.0579900000000000
2016-01-01	2.8969800000000000