Year	Percent
1979-12-31	-2.16
1980-12-31	2.4
1981-12-31	-0.81
1982-12-31	-0.61
1983-12-31	0.47
1984-12-31	-0.47
1985-12-31	-2.59
1986-12-31	-3.32
1987-12-31	-1.31
1988-12-31	-3
1989-12-31	-4.92
1990-12-31	-5.4
1991-12-31	-6.08
1992-12-31	-2.32
1993-12-31	-1.245
1994-12-31	-0.0625
1995-12-31	-0.65
1996-12-31	-0.86
1997-12-31	-1.41
1998-12-31	-0.575
1999-12-31	-0.05
2000-12-31	0.305
2001-12-31	-1.49
2002-12-31	-1.995
2003-12-31	-2.57
2004-12-31	-1.905
2005-12-31	0.17
2006-12-31	0.02
2007-12-31	-1.09
2008-12-31	-0.275
2009-12-31	-0.18
2010-12-31	-0.265
2011-12-31	-0.28
2012-12-31	-0.1
2013-12-31	-0.23
2014-12-31	-0.23
2015-12-31	0.08
2016-12-31	0.565
2017-12-31	0.86
2018-12-31	1.115
2019-12-31	0.645
2020-12-31	0.13