Year	Percent
1983-01-01	1.22900000000000000
1984-01-01	1.39694000000000000
1985-01-01	1.81611000000000000
1986-01-01	0.37689100000000000
1987-01-01	0.12700999999999998
1988-01-01	1.36582000000000000
1989-01-01	0.07679800000000000
1990-01-01	0.07679800000000000
1991-01-01	2.24261000000000000
1992-01-01	1.85835999999999980
1993-01-01	1.10712000000000000
1994-01-01	0.67640100000000000
1995-01-01	0.99913999999999990
1996-01-01	1.34614000000000000
1997-01-01	2.09072000000000000
1998-01-01	1.58507000000000000
1999-01-01	3.75125000000000000
2000-01-01	2.94208000000000000
2001-01-01	3.29846999999999960
2002-01-01	3.77837000000000000
2003-01-01	5.06939000000000000
2004-01-01	5.40338000000000000
2005-01-01	4.40701999999999900
2006-01-01	7.53286000000000000
2007-01-01	7.51638000000000100
2008-01-01	7.06988999999999900
2009-01-01	6.91736000000000000
2010-01-01	3.78474000000000000
2011-01-01	3.59400000000000000
2012-01-01	3.28825000000000000
2013-01-01	2.44793000000000000
2014-01-01	2.99802000000000000
2015-01-01	3.20524000000000030
2016-01-01	3.50023000000000000