Year	Percent
1980-01-01	3.80000
1981-01-01	2.00000
1982-01-01	1.70000
1983-01-01	2.10000
1984-01-01	3.30000
1985-01-01	0.70000
1986-01-01	0.65000
1987-01-01	2.60000
1988-01-01	4.00000
1989-01-01	8.00000
1990-01-01	5.60000
1991-01-01	5.00000
1992-01-01	9.00000
1993-01-01	12.50000
1994-01-01	6.80000
1995-01-01	6.50000
1996-01-01	6.82000
1997-01-01	9.69000
1998-01-01	7.38000
1999-01-01	8.64000
2000-01-01	10.86000
2001-01-01	8.06000
2002-01-01	6.79000
2003-01-01	4.79000
2004-01-01	6.11000
2005-01-01	8.68000
2006-01-01	7.08000
2007-01-01	6.17000
2008-01-01	3.17000
2009-01-01	6.47000
2010-01-01	11.11000
2011-01-01	9.95000
2012-01-01	7.39000
2013-01-01	9.05000
2014-01-01	6.40000
2015-01-01	10.04890
2016-01-01	8.28378