Year	Percent
1980-01-01	0.5781920000000000000
1981-01-01	3.3450500000000000000
1982-01-01	4.2578500000000000000
1983-01-01	4.4900900000000000000
1984-01-01	5.3906000000000000000
1985-01-01	5.8351900000000000000
1986-01-01	5.5419400000000000000
1987-01-01	4.7788200000000000000
1988-01-01	3.6618699999999995000
1989-01-01	2.6323100000000000000
1990-01-01	1.6550099999999999000
1991-01-01	2.5277100000000000000
1992-01-01	6.2173800000000000000
1993-01-01	8.0164900000000000000
1994-01-01	7.0121400000000000000
1995-01-01	4.7675100000000000000
1996-01-01	2.8808700000000003000
1997-01-01	2.8624300000000000000
1998-01-01	2.9235500000000000000
1999-01-01	2.7377900000000000000
2000-01-01	2.4272200000000000000
2001-01-01	2.2756400000000000000
2002-01-01	1.5554000000000000000
2003-01-01	0.4172280000000000000
2004-01-01	0.0349630000000000000
2005-01-01	0.0244130000000000000
2006-01-01	0.0166820000000000000
2007-01-01	0.0080330000000000000
2008-01-01	0.0062280000000000000
2009-01-01	0.0039390000000000000
2010-01-01	0.0018730000000000000
2011-01-01	0.0017660000000000000
2012-01-01	0.0016699999999999998
2013-01-01	0.0015720000000000000
2014-01-01	0.0014580000000000000
2015-01-01	0.0012810000000000000
2016-01-01	0.0011769999999999999