Year	Percent
1977-01-01	0.06509500000000000
1978-01-01	0.08231100000000000
1979-01-01	0.06690600000000000
1980-01-01	0.08486100000000000
1981-01-01	0.09147000000000001
1982-01-01	0.21483700000000000
1983-01-01	0.13328500000000000
1984-01-01	0.13931500000000002
1985-01-01	0.15010500000000000
1986-01-01	0.14056500000000000
1987-01-01	0.13524800000000000
1988-01-01	0.15007200000000000
1989-01-01	0.14563700000000000
1990-01-01	0.16208599999999998
1991-01-01	0.18691600000000000
1992-01-01	0.16649900000000000
1993-01-01	0.16776200000000000
1994-01-01	0.16390900000000000
1995-01-01	1.07092000000000000
1996-01-01	1.12555000000000000
1997-01-01	1.03647999999999980
1998-01-01	0.94070800000000000
1999-01-01	0.89099800000000000
2000-01-01	0.90956299999999990
2001-01-01	1.24702000000000000
2002-01-01	1.51863000000000000
2003-01-01	1.86602999999999990
2004-01-01	1.72450000000000000
2005-01-01	2.10677000000000000
2006-01-01	2.27055999999999970
2007-01-01	2.31051000000000000
2008-01-01	1.97553000000000000
2009-01-01	1.67884000000000000
2010-01-01	1.42396000000000010
2011-01-01	1.23092000000000000
2012-01-01	1.21004000000000000
2013-01-01	1.19891000000000010
2014-01-01	1.17428000000000000
2015-01-01	1.00772000000000020
2016-01-01	0.95706900000000010
2017-01-01	0.98476200000000000