Year	Percent
1980-01-01	0.062315999999999996
1981-01-01	0.060472000000000005
1982-01-01	0.060472000000000005
1983-01-01	0.060472000000000005
1984-01-01	0.060472000000000005
1985-01-01	0.049451999999999996
1986-01-01	0.065112000000000000
1987-01-01	0.068118000000000000
1988-01-01	0.061025000000000000
1989-01-01	0.070807000000000010
1990-01-01	0.069258000000000000
1991-01-01	0.061611000000000000
1992-01-01	0.054373000000000005
1993-01-01	0.051519000000000000
1994-01-01	0.871945000000000100
1995-01-01	23.855700000000000000
1996-01-01	22.584200000000000000
1997-01-01	21.777300000000000000
1998-01-01	19.473400000000000000
1999-01-01	25.674700000000000000
2000-01-01	45.493500000000000000
2001-01-01	24.349100000000000000
2002-01-01	21.359700000000000000
2003-01-01	19.126200000000000000
2004-01-01	17.082900000000000000
2005-01-01	16.750000000000000000
2006-01-01	13.488700000000000000
2007-01-01	12.251100000000000000
2008-01-01	10.077800000000000000
2009-01-01	5.199540000000000000
2010-01-01	4.212810000000000000
2011-01-01	2.861430000000000000
2012-01-01	2.322580000000000000
2013-01-01	1.544379999999999900
2014-01-01	2.808300000000000000
2015-01-01	3.710709999999999700
2016-01-01	6.629950000000000000