Year	Percent
1961	3.74727
1962	-2.41045
1963	-6.77163
1964	8.4644
1965	8.93466
1966	-2.08931
1967	1.73649
1968	3.33959
1969	8.07792
1970	1.46783
1971	3.95235
1972	-0.07958
1973	1.05657
1974	3.75964
1975	-1.64866
1976	-3.53616
1977	5.33716
1978	-5.90356
1979	8.60316
1980	2.59035
1981	-7.135
1982	-6.43433
1983	2.25024
1984	0.61932
1985	-9.00951
1986	6.23806
1987	1.36854
1988	-3.99437
1989	-8.83813
1990	-3.78912
1991	11.09415
1992	10.40666
1993	4.49187
1994	4.46663
1995	-4.0576
1996	4.26087
1997	6.86114
1998	2.68214
1999	-4.45705
2000	-1.88501
2001	-5.46511
2002	-11.87718
2003	7.64379
2004	7.84911
2005	7.69269
2006	6.91803
2007	7.88585
2008	2.99517
2009	-6.88015
2010	8.99144
2011	4.90213
2012	-2.06057
2013	1.33845
2014	-3.5142
2015	1.69894
2016	-2.78459
2017	1.87966