Year	Percent
1977-01-01	0.46476500000000000
1978-01-01	0.39912500000000000
1979-01-01	0.33926300000000004
1980-01-01	0.33057900000000000
1981-01-01	0.25459899999999996
1982-01-01	0.25459899999999996
1983-01-01	0.25459899999999996
1984-01-01	0.25459899999999996
1985-01-01	0.25459899999999996
1986-01-01	0.25459899999999996
1987-01-01	0.25459899999999996
1988-01-01	0.25459899999999996
1989-01-01	0.25459899999999996
1990-01-01	0.25459899999999996
1991-01-01	0.25459899999999996
1992-01-01	0.25459899999999996
1993-01-01	0.25459899999999996
1994-01-01	0.33437900000000000
1995-01-01	0.26804800000000000
1996-01-01	0.28390000000000000
1997-01-01	0.27757900000000000
1998-01-01	11.77990000000000000
1999-01-01	13.43380000000000000
2000-01-01	13.30099999999999800
2001-01-01	10.93160000000000000
2002-01-01	10.63820000000000000
2003-01-01	4.14481000000000000
2004-01-01	2.70133000000000000
2005-01-01	2.99502000000000020
2006-01-01	3.40556000000000000
2007-01-01	3.45270000000000000
2008-01-01	2.02707000000000000
2009-01-01	3.88120000000000000
2010-01-01	2.48860000000000000
2011-01-01	0.62596400000000010
2012-01-01	2.39990000000000000
2013-01-01	5.38172000000000000
2014-01-01	5.00058000000000000
2015-01-01	4.99996999999999900
2016-01-01	4.88073000000000100