Year	Percent
1985-01-01	4.032258056286270
1986-01-01	1.073966408268300
1987-01-01	3.643045458177040
1988-01-01	3.121868496107260
1989-01-01	3.991628046045730
1990-01-01	5.836687751581660
1991-01-01	5.555555555555810
1992-01-01	3.873375369964780
1993-01-01	5.215559960357100
1994-01-01	6.311079712704410
1995-01-01	3.361391073208950
1996-01-01	3.225287972139800
1997-01-01	2.999948097784110
1998-01-01	1.869488536155410
1999-01-01	2.280371982587530
2000-01-01	4.044021311905130
2001-01-01	2.883604303162620
2002-01-01	3.315774991155300
2003-01-01	3.657376581375440
2004-01-01	2.529938059187920
2005-01-01	3.395625246124630
2006-01-01	3.608711458892330
2007-01-01	5.391202640043190
2008-01-01	8.957732187589070
2009-01-01	-2.136371573249150
2010-01-01	2.077739020277830
2011-01-01	4.316331940827210
2012-01-01	0.627927921638161
2013-01-01	-2.372263280150730
2014-01-01	0.421637771012246
2015-01-01	0.475066610523930
2016-01-01	-0.886758352362135
2017-01-01	-0.481314508082782