Year	Percent
1986-01-01	0.40621199999999996
1987-01-01	0.40621199999999996
1988-01-01	0.40621199999999996
1989-01-01	0.40621199999999996
1990-01-01	0.40621199999999996
1991-01-01	0.40621199999999996
1992-01-01	0.40621199999999996
1993-01-01	0.40621199999999996
1994-01-01	0.40621199999999996
1995-01-01	0.40621199999999996
1996-01-01	0.40621199999999996
1997-01-01	0.40621199999999996
1998-01-01	0.40621199999999996
1999-01-01	0.40621199999999996
2000-01-01	16.78000000000000000
2001-01-01	15.66000000000000000
2002-01-01	14.45000000000000000
2003-01-01	15.63000000000000000
2004-01-01	16.02000000000000000
2005-01-01	17.83000000000000000
2006-01-01	17.53000000000000000
2007-01-01	14.68000000000000000
2008-01-01	8.02000000000000000
2009-01-01	9.82000000000000000
2010-01-01	7.91000000000000000
2011-01-01	6.15000000000000000
2012-01-01	7.30000000000000000
2013-01-01	7.28000000000000000
2014-01-01	6.70000000000000000
2015-01-01	6.65000000000000000
2016-01-01	5.99000000000000000