Year	annual %
1961	-0.5563105004864468
1962	-0.3488728302881441
1963	-3.478943274408053
1964	1.2707320446653938
1965	-3.0428584239021887
1966	-0.6176662897485699
1967	2.7073097165025644
1968	3.9155361146108163
1969	0.8301021466909475
1970	2.272999097878042
1971	0.8799712347450992
1972	-4.2218455387559715
1973	-5.53206224692407
1974	-1.0344960035738353
1975	-1.7436355318813668
1976	-5.924180498633902
1977	-0.6331081805942063
1978	-5.4960340043671465
1979	6.677792801023827
1980	-1.9340385583998625
1981	-12.33875992094228
1982	-4.6311831181449605
1983	-1.8876532743562962
1984	-1.0333055829712379
1985	-1.6209463500468502
1986	-0.8388688166036644
1987	-1.631522215476224
1988	0.48860652792825476
1989	1.0983895200566565
1990	0.1257742331296896
1991	-9.079976665300777
1992	-1.8495860112610245
1993	-1.011340274739652
1994	-3.1370857087599546
1995	-1.4959783702956315
1996	-1.044504204522795
1997	0.45581939620697653
1998	0.7007417141496717
1999	1.5048423142965106
2000	1.3292527461553618
2001	2.851923166929865
2002	-14.96403254293412
2003	6.611220264606899
2004	2.2207475622130204
2005	1.7378595590521684
2006	2.358459365917213
2007	2.6617483814245873
2008	3.6504965029100447
2009	-6.72284484044134
2010	-2.2235258154659334
2011	-1.226482202253976
2012	0.2388468405150519
2013	-0.3964845902117702
2014	0.6596912206466641
2015	0.4972877859250673
2016	1.3383460258881428
2017	1.2819054385076072
2018	0.5920668530900741
2019	1.8075321252673433
2020	-9.414529771742906
2021	3.2146626649715273
2022	1.3563374138068554
2023	1.5370401153404174