Year	Percent
1979-12-31	-0.3735
1980-12-31	-0.6462
1981-12-31	0.5421
1982-12-31	0.1062
1983-12-31	-0.0642
1984-12-31	0.0948
1985-12-31	-0.4449
1986-12-31	-0.499
1987-12-31	-0.3551
1988-12-31	-0.3271
1989-12-31	-0.6099
1990-12-31	-0.9783
1991-12-31	-0.862
1992-12-31	-0.9154
1993-12-31	-0.3663
1994-12-31	-0.1133
1995-12-31	-0.0761
1996-12-31	-0.0767
1997-12-31	-0.1523
1998-12-31	-0.2516
1999-12-31	-0.0173
2000-12-31	0.0568
2001-12-31	-0.134
2002-12-31	-0.2787
2003-12-31	-0.3445
2004-12-31	-0.4663
2005-12-31	-0.2004
2006-12-31	0.0617
2007-12-31	-0.0853
2008-12-31	-0.3296
2009-12-31	-0.0253
2010-12-31	-0.0259
2011-12-31	-0.0509
2012-12-31	-0.0233
2013-12-31	-0.0322
2014-12-31	-0.0391
2015-12-31	-0.0262
2016-12-31	0.0489
2017-12-31	0.1239
2018-12-31	0.1824
2019-12-31	0.1799