Year	Percent
1976	-0.12464
1977	0.10805
1978	0.24962
1979	0.14072
1980	0.61808
1981	0.02471
1982	0.07487
1983	0.04387
1984	0.08898
1985	0.03788
1986	-0.32902
1987	-0.70715
1988	0.92547
1989	-0.50384
1990	0.00083
1991	0.10241
1992	0.04667
1993	0.00205
1994	0.05021
1995	-0.7192
1996	-0.02835
1997	-0.00532
1998	-0.00495
1999	0.04404
2000	0.01602
2001	0.02086
2002	-0.02568
2003	-0.0857
2004	0.00158
2005	0.13251
2006	0.01182
2007	0.08126
2008	0
2009	0.03748
2010	0.00258
2011	0.00469
2012	0.41692
2013	0
2014	0
2015	-0.00053
2016	-0.00016