Year	Percent
1976-01-01	0.924527000000000100
1977-01-01	0.531281999999999900
1978-01-01	0.470145000000000000
1979-01-01	0.398074000000000000
1980-01-01	0.213902000000000000
1981-01-01	0.189637000000000000
1982-01-01	0.257517000000000000
1983-01-01	0.168318000000000000
1984-01-01	0.209790999999999980
1985-01-01	0.231384999999999980
1986-01-01	0.264623000000000000
1987-01-01	0.427313000000000000
1988-01-01	0.273872000000000000
1989-01-01	0.203791000000000000
1990-01-01	0.168847000000000000
1991-01-01	0.554873000000000000
1992-01-01	0.473606999999999940
1993-01-01	0.411026000000000000
1994-01-01	0.361717000000000000
1995-01-01	0.337965000000000000
1996-01-01	0.294199000000000000
1997-01-01	0.282566000000000000
1998-01-01	0.256342000000000000
1999-01-01	0.225601000000000020
2000-01-01	0.205219999999999990
2001-01-01	0.192290000000000020
2002-01-01	0.187440000000000000
2003-01-01	0.196003000000000000
2004-01-01	0.242584000000000020
2005-01-01	0.141118000000000000
2006-01-01	0.053170000000000000
2007-01-01	0.079493000000000000
2008-01-01	0.063151000000000000
2009-01-01	0.040920000000000000
2010-01-01	0.024515000000000002
2011-01-01	0.094274000000000000
2012-01-01	0.066933000000000000
2013-01-01	0.065170000000000000
2014-01-01	0.045279000000000000
2015-01-01	0.050756000000000000
2016-01-01	0.013470000000000000
2017-01-01	0.013863000000000000