Year	Percent
1980-01-01	2.7897900000000000
1981-01-01	2.7341800000000000
1982-01-01	2.9926300000000000
1983-01-01	2.0520600000000000
1984-01-01	1.2103800000000000
1985-01-01	1.6282200000000000
1986-01-01	1.2804799999999998
1987-01-01	0.9164490000000000
1988-01-01	0.7156480000000000
1989-01-01	0.9837350000000000
1990-01-01	0.8289790000000001
1991-01-01	0.8669580000000000
1992-01-01	1.6194899999999999
1993-01-01	0.7045859999999999
1994-01-01	0.3517330000000000
1995-01-01	0.3546240000000000
1996-01-01	0.7125729999999999
1997-01-01	3.9011500000000000
1998-01-01	6.0673300000000000
1999-01-01	8.3180600000000010
2000-01-01	9.3642000000000000
2001-01-01	9.3729100000000010
2002-01-01	8.6540000000000000
2003-01-01	7.3591800000000000
2004-01-01	7.6300899999999990
2005-01-01	7.0375700000000000
2006-01-01	7.9632200000000000
2007-01-01	8.8618600000000000
2008-01-01	8.3862800000000010
2009-01-01	10.5305000000000000
2010-01-01	11.4827000000000000
2011-01-01	10.2891000000000000
2012-01-01	10.6078000000000000
2013-01-01	11.0125000000000000
2014-01-01	10.9754000000000000
2015-01-01	10.1708000000000000
2016-01-01	10.3779000000000000