Year	Percent
1979-12-31	-3.1054
1980-12-31	-3.5547
1981-12-31	4.4947
1982-12-31	2.23
1983-12-31	-0.1423
1984-12-31	1.9125
1985-12-31	-2.9301
1986-12-31	-4.9125
1987-12-31	-3.123
1988-12-31	-3.4783
1989-12-31	-6.035
1990-12-31	-9.2521
1991-12-31	-7.5567
1992-12-31	-8.514
1993-12-31	-2.9928
1994-12-31	-1.0343
1995-12-31	-1.3699
1996-12-31	-0.782
1997-12-31	-1.7825
1998-12-31	-2.5495
1999-12-31	-0.0099
2000-12-31	0.6755
2001-12-31	-1.5859
2002-12-31	-3.1601
2003-12-31	-3.9545
2004-12-31	-4.8829
2005-12-31	-1.1772
2006-12-31	0.6167
2007-12-31	-1.6495
2008-12-31	-3.6727
2009-12-31	-0.1335
2010-12-31	-0.3362
2011-12-31	-0.7916
2012-12-31	-0.2863
2013-12-31	-0.3126
2014-12-31	-0.6307
2015-12-31	-0.1501
2016-12-31	0.7262
2017-12-31	1.4971
2018-12-31	2.3352
2019-12-31	1.7634
2020-12-31	0.4203