Year	Percent
1981-01-01	11.224489796022500
1982-01-01	6.839032527162880
1983-01-01	4.996096799804850
1984-01-01	3.382899628637080
1985-01-01	6.237166118055500
1986-01-01	0.799771493858953
1987-01-01	2.011901388495290
1988-01-01	3.138888888888940
1989-01-01	2.127659574468060
1990-01-01	3.059071729957860
1991-01-01	0.761951500806881
1992-01-01	2.396700730251880
1993-01-01	1.472596946936810
1994-01-01	2.569343046442960
1995-01-01	2.889615843721520
1996-01-01	5.965020975372400
1997-01-01	1.149037567605420
1998-01-01	2.195262500375890
1999-01-01	2.621395245827470
2000-01-01	3.067439669305870
2001-01-01	1.149037561716610
2002-01-01	2.195262499368090
2003-01-01	2.621395249001730
2004-01-01	3.067439670713410
2005-01-01	3.651417865273400
2006-01-01	4.240266606115830
2007-01-01	2.318082746420170
2008-01-01	6.394431002500740
2009-01-01	-1.104310448643880
2010-01-01	0.917977376606477
2011-01-01	1.602082225413100
2012-01-01	1.300580745478570
2013-01-01	0.509747768983255
2014-01-01	1.201399644810450
2015-01-01	-0.861593811244676
2016-01-01	0.661168347244125
2017-01-01	1.150370720443260