Year	Percent
1976-01-01	0.15782800000000000
1977-01-01	0.26917500000000000
1978-01-01	0.20309200000000000
1979-01-01	0.15172500000000000
1980-01-01	0.86579400000000010
1981-01-01	0.95352999999999990
1982-01-01	1.00844000000000000
1983-01-01	1.05775000000000000
1984-01-01	0.97880400000000010
1985-01-01	1.15465000000000000
1986-01-01	1.50307000000000010
1987-01-01	1.41693000000000000
1988-01-01	1.27155000000000000
1989-01-01	0.89809699999999990
1990-01-01	0.86379300000000000
1991-01-01	0.82202000000000010
1992-01-01	0.83607800000000010
1993-01-01	0.74728900000000000
1994-01-01	0.67758600000000000
1995-01-01	0.58957299999999990
1996-01-01	0.56074300000000000
1997-01-01	0.69716200000000000
1998-01-01	1.32401000000000010
1999-01-01	0.89276000000000000
2000-01-01	0.80239200000000000
2001-01-01	0.84443899999999990
2002-01-01	0.84084300000000000
2003-01-01	0.86106100000000010
2004-01-01	0.77351900000000000
2005-01-01	0.57657100000000010
2006-01-01	0.47697300000000000
2007-01-01	0.45691600000000000
2008-01-01	0.69370100000000000
2009-01-01	0.66327400000000000
2010-01-01	0.53318400000000000
2011-01-01	0.54737600000000000
2012-01-01	0.53737000000000000
2013-01-01	0.49443700000000000
2014-01-01	0.46413500000000000
2015-01-01	0.46602299999999997
2016-01-01	0.45971000000000006
2017-01-01	0.40660400000000000