Year	Percent
1981-01-01	9.137055837563380
1982-01-01	6.356589147286870
1983-01-01	1.166180758017520
1984-01-01	3.073967339097250
1985-01-01	2.353215284249290
1986-01-01	1.781242886410650
1987-01-01	1.246854906345790
1988-01-01	1.192842942345950
1989-01-01	1.304300371098210
1990-01-01	2.138662931637960
1991-01-01	1.600000000000010
1992-01-01	1.279527559055150
1993-01-01	4.251700680272150
1994-01-01	2.462518449467860
1995-01-01	5.966641394996150
1996-01-01	1.996136509980770
1997-01-01	1.711560044893340
1998-01-01	-0.441379310344884
1999-01-01	-0.415627597672464
2000-01-01	1.558152476349450
2001-01-01	0.595890410959013
2002-01-01	-2.314972424593220
2003-01-01	0.299999999999962
2004-01-01	0.814223994682602
2005-01-01	1.244437118839650
2006-01-01	0.159888078345143
2007-01-01	0.967774119525083
2008-01-01	2.084980237154170
2009-01-01	1.035717742716120
2010-01-01	0.356869132017602
2011-01-01	0.137911563169595
2012-01-01	0.111766261400246
2013-01-01	0.389205053123642
2014-01-01	-0.207108731719878
2015-01-01	-0.415121925856300
2016-01-01	-0.739068722339895
2017-01-01	-0.171311525411196