Year	Percent
1976	1.62251
1978	0.21274
1981	0
1982	-0.01973
1983	0.03821
1984	-0.0981
1985	-0.1681
1986	-0.05945
1987	-0.00142
1988	-0.01923
1989	-0.0011
1990	-0.00368
1991	-0.00671
1992	0.45597
1993	0.02938
1994	-0.05725
1995	0.02195
1996	0.00306
1997	0.05218
1998	0.082
1999	0.00596
2000	0.12079
2001	0.38499
2002	1.33594
2003	-1.25378
2004	0.82526
2005	-0.32285
2006	0.69133
2007	-0.70533
2008	0.4054
2009	-0.2788
2010	0.46718
2011	-0.46713
2012	0.12223
2013	0.23207
2014	0.44622
2015	0.82155
2016	0.33241
2017	0.28089