Year	Percent
1961	-0.37766
1962	-0.19251
1963	-3.34582
1964	1.39643
1965	-2.9379
1966	-0.51141
1967	2.83661
1968	4.07106
1969	1.00817
1970	2.48484
1971	1.13737
1972	-3.95548
1973	-5.29081
1974	-0.8142
1975	-1.55883
1976	-5.78002
1977	-0.512
1978	-5.40629
1979	6.74885
1980	-2.04937
1981	-12.2634
1982	-4.60447
1983	-1.96596
1984	-1.1714
1985	-1.68498
1986	-0.88359
1987	-1.63112
1988	0.52725
1989	1.15784
1990	0.19603
1991	-9.00965
1992	-1.76287
1993	-0.91688
1994	-3.06248
1995	-1.37384
1996	-0.99055
1997	0.47623
1998	0.69735
1999	1.41488
2000	1.54231
2001	2.79623
2002	-15.29999
2003	6.51899
2004	2.1598
2005	1.55822
2006	1.99911
2007	3.216
2008	4.1126
2009	-6.68615
2010	-2.49815
2011	-1.30924
2012	0.24915
2013	-0.48174
2014	0.56254
2015	0.37516
2016	1.41605
2017	1.4155