Year	Percent
1989-01-01	8.770945541591790
1990-01-01	7.969693843632220
1991-01-01	9.568877659348390
1992-01-01	7.713921683566140
1993-01-01	6.705885527700430
1994-01-01	6.252068902102700
1995-01-01	8.558666043084480
1996-01-01	4.822486767834840
1997-01-01	3.490937151388590
1998-01-01	0.172630384568554
1999-01-01	-3.199455411844810
2000-01-01	-1.605719643694250
2001-01-01	-1.986218599748010
2002-01-01	-2.639000013116310
2003-01-01	-1.561384364601430
2004-01-01	0.982619406048985
2005-01-01	4.395023581070080
2006-01-01	5.149874725759770
2007-01-01	5.570507913775660
2008-01-01	8.609519354461450
2009-01-01	1.169351365320000
2010-01-01	2.809766065688940
2011-01-01	5.804468001407900
2012-01-01	6.108311726432170
2013-01-01	5.506786662732370
2014-01-01	6.045271805628380
2015-01-01	4.559202881231630
2016-01-01	2.370161347531690
2017-01-01	1.226554559733910