Year	Percent
1982-01-01	0.533743000000000100
1983-01-01	0.360406000000000000
1984-01-01	0.317626000000000000
1985-01-01	0.277028000000000000
1986-01-01	0.357719000000000000
1987-01-01	0.204642000000000020
1988-01-01	0.055885000000000004
1989-01-01	0.074906000000000000
1990-01-01	0.128032999999999980
1991-01-01	0.135841000000000020
1992-01-01	0.122368000000000000
1993-01-01	0.085781000000000000
1994-01-01	5.516400000000000000
1995-01-01	5.283720000000000000
1996-01-01	5.298369999999999000
1997-01-01	5.631550000000000000
1998-01-01	5.116680000000001000
1999-01-01	8.041630000000000000
2000-01-01	8.521310000000000000
2001-01-01	8.769039999999999000
2002-01-01	9.864090000000000000
2003-01-01	10.050100000000000000
2004-01-01	8.710960000000000000
2005-01-01	6.705010000000001000
2006-01-01	4.664400000000000000
2007-01-01	3.670069999999999500
2008-01-01	2.821059999999999700
2009-01-01	3.097010000000000000
2010-01-01	2.290170000000000300
2011-01-01	1.911720000000000000
2012-01-01	2.092580000000000000
2013-01-01	2.285850000000000000
2014-01-01	2.333409999999999800
2015-01-01	2.571150000000000000
2016-01-01	2.787570000000000000