Year	Percent
1980-01-01	0.78989500000000000
1981-01-01	0.95983500000000000
1982-01-01	0.87539200000000010
1983-01-01	0.99608999999999990
1984-01-01	0.72805800000000000
1985-01-01	0.57283500000000000
1986-01-01	0.57532900000000000
1987-01-01	0.25985199999999997
1988-01-01	0.23643400000000000
1989-01-01	0.17202400000000000
1990-01-01	0.27005100000000004
1991-01-01	0.20993800000000000
1992-01-01	0.70495500000000000
1993-01-01	0.70495500000000000
1994-01-01	2.37549000000000000
1995-01-01	8.90824000000000000
1996-01-01	3.46812000000000000
1997-01-01	3.00418000000000000
1998-01-01	3.00418000000000000
1999-01-01	3.68700000000000000
2000-01-01	4.90000000000000000
2001-01-01	4.41697000000000000
2002-01-01	4.09250000000000000
2003-01-01	4.92978000000000000
2004-01-01	4.25623000000000000
2005-01-01	4.17235000000000000
2006-01-01	4.33028000000000000
2007-01-01	4.46759000000000000
2008-01-01	7.14425000000000000
2009-01-01	7.43174000000000000
2010-01-01	8.09900000000000000
2011-01-01	7.58259000000000000
2012-01-01	7.92753000000000000
2013-01-01	8.11836000000000100
2014-01-01	8.14515000000000000
2015-01-01	7.89990000000000000
2016-01-01	7.08615000000000000