Year	Percent
1965-01-01	0.3465610000000000
1966-01-01	1.1495400000000000
1967-01-01	1.1147700000000000
1968-01-01	1.3338500000000000
1969-01-01	1.4951400000000000
1970-01-01	1.4669700000000000
1971-01-01	0.7976210000000000
1972-01-01	0.0794750000000000
1973-01-01	0.0794750000000000
1974-01-01	0.0794750000000000
1975-01-01	0.0794750000000000
1976-01-01	0.0794750000000000
1977-01-01	0.0794750000000000
1978-01-01	0.0794750000000000
1979-01-01	0.0794750000000000
1980-01-01	0.0794750000000000
1981-01-01	0.0794750000000000
1982-01-01	0.0794750000000000
1983-01-01	0.0794750000000000
1984-01-01	0.0794750000000000
1985-01-01	0.0794750000000000
1986-01-01	0.0794750000000000
1987-01-01	0.0794750000000000
1988-01-01	0.0794750000000000
1989-01-01	0.0794750000000000
1990-01-01	0.0794750000000000
1991-01-01	0.0794750000000000
1992-01-01	0.0794750000000000
1993-01-01	0.0794750000000000
1994-01-01	0.0794750000000000
1995-01-01	0.0794750000000000
1996-01-01	0.0794750000000000
1997-01-01	0.0794750000000000
1998-01-01	0.0794750000000000
1999-01-01	0.0794750000000000
2000-01-01	1.5735100000000000
2001-01-01	3.6070800000000003
2002-01-01	3.6636000000000000
2003-01-01	3.6076400000000000
2004-01-01	3.4996400000000003
2005-01-01	3.3046400000000000
2006-01-01	2.8912500000000000
2007-01-01	2.4055600000000000
2008-01-01	2.4911300000000000
2009-01-01	2.5367300000000000
2010-01-01	2.3168100000000000
2011-01-01	2.0789900000000000
2012-01-01	1.9184000000000000
2013-01-01	1.8462200000000000
2014-01-01	1.7946900000000001
2015-01-01	1.8269500000000000
2016-01-01	2.0398000000000000