Year	Percent
1975	0.07343
1976	0.8113
1977	0.76393
1978	0.72462
1979	-0.1918
1987	0.01153
1988	0.00251
1989	-0.01279
1990	0.00685
1991	-0.03796
1992	0.05449
1993	0
1994	0
1995	0
1996	0.05589
1997	-0.25157
1998	-0.00051
1999	0.02408
2000	0.13584
2001	0.49827
2002	0.04046
2003	0.03025
2004	0.01436
2005	-1.03489
2006	1.13004
2007	1.72594
2008	0.88951
2009	-1.00929
2010	-0.25222
2011	0.03374
2012	0.12819
2013	0.02155
2014	0.00427
2015	0.62831
2016	0.69069
2017	0.35548