Year	Percent
1987-01-01	7.233835530656030
1988-01-01	18.811817944875300
1989-01-01	18.245638362164800
1990-01-01	3.052290120752330
1991-01-01	3.556685652204510
1992-01-01	6.353981340248700
1993-01-01	14.610078635660300
1994-01-01	24.256984350575400
1995-01-01	16.791227016885100
1996-01-01	8.313153343831530
1997-01-01	2.786468496555870
1998-01-01	-0.773182345961248
1999-01-01	-1.401473807766120
2000-01-01	0.347806256807194
2001-01-01	0.719132436811498
2002-01-01	-0.731975500083577
2003-01-01	1.127601960904960
2004-01-01	3.824637624009330
2005-01-01	1.776416168431460
2006-01-01	1.649433101399800
2007-01-01	4.816765313437520
2008-01-01	5.925255288709200
2009-01-01	-0.728171334173071
2010-01-01	3.175327980755740
2011-01-01	5.553897059043240
2012-01-01	2.619526164885420
2013-01-01	2.621049027010910
2014-01-01	1.921643415938940
2015-01-01	1.437024513947600
2016-01-01	2.000000000000020
2017-01-01	1.593137254901940