Year	Percent
1986-01-01	8.9438800000000000
1987-01-01	10.3871000000000000
1988-01-01	9.9504000000000000
1989-01-01	6.3038200000000000
1990-01-01	6.4632000000000000
1991-01-01	2.7523100000000000
1992-01-01	2.7715600000000000
1993-01-01	5.9259300000000000
1994-01-01	8.0462400000000000
1995-01-01	5.8017100000000000
1996-01-01	5.7123500000000000
1997-01-01	5.4876900000000000
1998-01-01	4.9479200000000000
1999-01-01	4.8032000000000000
2000-01-01	4.6598600000000000
2001-01-01	4.6712200000000000
2002-01-01	4.5815000000000000
2003-01-01	4.2770800000000010
2004-01-01	8.0303200000000000
2005-01-01	3.8592500000000000
2006-01-01	4.0708699999999990
2007-01-01	3.7729699999999995
2008-01-01	3.4928700000000000
2009-01-01	3.5852900000000000
2010-01-01	3.6931900000000000
2011-01-01	3.7178300000000000
2012-01-01	3.6623300000000003
2013-01-01	3.5183000000000000
2014-01-01	4.4794599999999996
2015-01-01	4.3367700000000000
2016-01-01	0.1129420000000000
2017-01-01	0.1095450000000000