Year	Percent
1982-01-01	10.970464135021300
1983-01-01	9.885931558935460
1984-01-01	8.650519031141820
1985-01-01	3.503184713375750
1986-01-01	3.384615384615320
1987-01-01	5.654761904761970
1988-01-01	7.887323943661820
1989-01-01	10.182767624020900
1990-01-01	10.426540284360300
1991-01-01	11.158798283261800
1992-01-01	9.652509652509640
1993-01-01	8.802816901408580
1994-01-01	8.737864077669830
1995-01-01	9.077380952380940
1996-01-01	6.275579809004110
1997-01-01	5.776636713735200
1998-01-01	2.912621359223950
1999-01-01	-4.009433962264420
2000-01-01	-3.685503685503690
2001-01-01	-1.658163265306100
2002-01-01	-2.983138780804160
2003-01-01	-2.673796791443940
2004-01-01	-0.274725274725253
2005-01-01	0.826446280991829
2006-01-01	2.014110150204810
2007-01-01	2.030117122141650
2008-01-01	4.296490652673020
2009-01-01	0.576519916142576
2010-01-01	2.313705054715980
2011-01-01	5.276561067535910
2012-01-01	4.063860667634250
2013-01-01	4.323570432357040
2014-01-01	4.438502673796800
2015-01-01	2.995391705069130
2016-01-01	2.411135968182940
2017-01-01	1.480582524271830