Year	Percent
1980-01-01	0.015977000000000000
1981-01-01	0.015846000000000002
1982-01-01	0.015363000000000000
1983-01-01	0.016919000000000000
1984-01-01	0.015572999999999998
1985-01-01	0.016559000000000000
1986-01-01	0.016984000000000000
1987-01-01	0.016984000000000000
1988-01-01	0.016984000000000000
1989-01-01	0.035189000000000000
1990-01-01	0.450612000000000000
1991-01-01	0.552002000000000000
1992-01-01	0.858293000000000100
1993-01-01	0.942043000000000100
1994-01-01	1.644650000000000000
1995-01-01	1.489050000000000000
1996-01-01	3.519069999999999700
1997-01-01	5.966670000000000000
1998-01-01	11.334900000000000000
1999-01-01	6.848880000000000000
2000-01-01	5.164900000000000000
2001-01-01	4.423440000000000000
2002-01-01	3.593120000000000000
2003-01-01	3.213609999999999600
2004-01-01	2.815309999999999800
2005-01-01	2.702590000000000300
2006-01-01	2.803730000000000000
2007-01-01	2.359550000000000000
2008-01-01	1.798880000000000000
2009-01-01	2.498160000000000000
2010-01-01	2.111820000000000300
2011-01-01	2.016220000000000000
2012-01-01	2.412320000000000200
2013-01-01	3.015150000000000000
2014-01-01	3.484090000000000000
2015-01-01	4.615600000000000000
2016-01-01	4.531030000000000000