Year	Percent
1979-12-31	-4.45
1980-12-31	2.45
1981-12-31	-1
1982-12-31	-0.9
1983-12-31	0.95
1984-12-31	-0.33
1985-12-31	-4.6
1986-12-31	-6.25
1987-12-31	-2.48
1988-12-31	-5
1989-12-31	-8.9
1990-12-31	-8.73
1991-12-31	-11.3
1992-12-31	-3.665
1993-12-31	-1.9
1994-12-31	-0.18
1995-12-31	-1.3
1996-12-31	-1.86
1997-12-31	-2.585
1998-12-31	-0.65
1999-12-31	-0.185
2000-12-31	0.415
2001-12-31	-2.805
2002-12-31	-3.87
2003-12-31	-5.025
2004-12-31	-3.19
2005-12-31	0.585
2006-12-31	-0.26
2007-12-31	-2.54
2008-12-31	-0.3
2009-12-31	-0.375
2010-12-31	-0.665
2011-12-31	-0.54
2012-12-31	-0.2
2013-12-31	-0.565
2014-12-31	-0.295
2015-12-31	0.275
2016-12-31	1.225
2017-12-31	1.855
2018-12-31	2.175
2019-12-31	1.265
2020-12-31	0.3