Year	Percent
1974-01-01	0.41822500000000000
1975-01-01	0.74261000000000000
1976-01-01	0.59087800000000000
1977-01-01	0.49923599999999996
1978-01-01	0.47827700000000006
1979-01-01	0.41008400000000000
1980-01-01	0.44981099999999996
1981-01-01	0.42295299999999997
1982-01-01	0.35354500000000000
1983-01-01	0.37927500000000000
1984-01-01	0.51041500000000000
1985-01-01	0.62360900000000000
1986-01-01	0.83848899999999990
1987-01-01	0.72239600000000000
1988-01-01	0.68845700000000000
1989-01-01	0.60707600000000010
1990-01-01	0.55996400000000000
1991-01-01	0.55927700000000000
1992-01-01	0.77493300000000000
1993-01-01	0.98785800000000000
1994-01-01	0.44164100000000000
1995-01-01	0.40967200000000004
1996-01-01	0.22628700000000000
1997-01-01	0.28907700000000000
1998-01-01	0.90444200000000000
1999-01-01	1.31941000000000000
2000-01-01	0.80209300000000010
2001-01-01	1.12952000000000000
2002-01-01	0.87381000000000010
2003-01-01	0.93291299999999990
2004-01-01	1.95592000000000000
2005-01-01	1.94911000000000000
2006-01-01	2.14187000000000000
2007-01-01	1.84907000000000000
2008-01-01	1.73459000000000000
2009-01-01	1.88464000000000000
2010-01-01	2.34835000000000000
2011-01-01	2.58902000000000000
2012-01-01	2.18724000000000000
2013-01-01	1.90234000000000010
2014-01-01	2.65852000000000000
2015-01-01	2.36532000000000000
2016-01-01	2.31704000000000000
2017-01-01	2.43554000000000000