Year	Percent
1961	7.0957
1962	2.16361
1963	-2.04302
1964	0.53455
1965	0.17858
1966	1.31141
1967	2.11537
1968	8.51639
1969	6.92792
1970	6.04094
1971	8.55946
1972	9.35101
1973	11.26692
1974	6.46307
1975	2.72312
1976	7.1994
1977	2.14585
1978	0.81137
1979	4.2718
1980	6.57398
1981	-6.60652
1982	-1.73046
1983	-5.59245
1984	2.9558
1985	5.658
1986	5.78705
1987	1.56536
1988	-1.99519
1989	1.38524
1990	-4.82823
1991	-0.24104
1992	-2.13329
1993	2.95437
1994	3.63788
1995	2.74945
1996	0.5858
1997	1.77086
1998	-1.20971
1999	-1.03635
2000	2.61077
2001	-0.02203
2002	1.68091
2003	-0.15213
2004	4.47265
2005	1.9935
2006	2.80501
2007	4.94203
2008	4.02764
2009	-1.10812
2010	6.50337
2011	2.9959
2012	0.98052
2013	2.07
2014	-0.37992
2015	-4.3688
2016	-4.25415
2017	0.18704