Year	Percent
1980-01-01	0.59707300000000000
1981-01-01	0.54574700000000000
1982-01-01	0.47243000000000000
1983-01-01	0.50032800000000000
1984-01-01	0.49749399999999994
1985-01-01	0.52795600000000010
1986-01-01	0.79687299999999990
1987-01-01	0.81408800000000000
1988-01-01	0.83520200000000000
1989-01-01	0.88565900000000000
1990-01-01	0.88565900000000000
1991-01-01	0.88565900000000000
1992-01-01	0.88565900000000000
1993-01-01	0.88565900000000000
1994-01-01	0.88565900000000000
1995-01-01	0.88565900000000000
1996-01-01	0.88565900000000000
1997-01-01	0.88565900000000000
1998-01-01	1.78124000000000020
1999-01-01	1.58127000000000020
2000-01-01	1.29429000000000000
2001-01-01	2.89065000000000000
2002-01-01	2.82829000000000000
2003-01-01	2.27245999999999970
2004-01-01	1.89940999999999980
2005-01-01	1.57421000000000000
2006-01-01	3.45219000000000030
2007-01-01	6.27495000000000000
2008-01-01	4.77062000000000000
2009-01-01	11.73020000000000000
2010-01-01	9.89618000000000100
2011-01-01	8.60783000000000000
2012-01-01	8.68798000000000000
2013-01-01	8.00213000000000100
2014-01-01	7.32430000000000000
2015-01-01	8.38866000000000000
2016-01-01	12.15090000000000000