Year	Percent
1976-01-01	0.036295999999999995
1977-01-01	0.036295999999999995
1978-01-01	0.036295999999999995
1979-01-01	0.036295999999999995
1980-01-01	0.036295999999999995
1981-01-01	0.036295999999999995
1982-01-01	0.036295999999999995
1983-01-01	0.036295999999999995
1984-01-01	0.036295999999999995
1985-01-01	0.036295999999999995
1986-01-01	0.019590000000000000
1987-01-01	0.021512000000000000
1988-01-01	0.015323000000000000
1989-01-01	0.007199000000000000
1990-01-01	0.334662000000000000
1991-01-01	0.329634000000000040
1992-01-01	0.414497000000000000
1993-01-01	1.071460000000000000
1994-01-01	1.216410000000000000
1995-01-01	1.580330000000000000
1996-01-01	1.938290000000000000
1997-01-01	2.299970000000000000
1998-01-01	2.854420000000000000
1999-01-01	5.545970000000000000
2000-01-01	7.214739999999999000
2001-01-01	5.805700000000000000
2002-01-01	5.037040000000000000
2003-01-01	5.036330000000000000
2004-01-01	5.023120000000000000
2005-01-01	5.926700000000000000
2006-01-01	6.268550000000000000
2007-01-01	6.550640000000000500
2008-01-01	5.000809999999999500
2009-01-01	4.386520000000000000
2010-01-01	3.736630000000000300
2011-01-01	3.381319999999999700
2012-01-01	2.816309999999999600
2013-01-01	2.584690000000000000
2014-01-01	2.430490000000000300
2015-01-01	2.404620000000000000
2016-01-01	2.648790000000000000
2017-01-01	2.764570000000000000