Year	annual %
1961	0.8754308591946786
1962	1.5003283870705997
1963	1.0958026148008866
1964	0.6085538042183316
1965	0.10894937409823782
1966	-0.008171730151732353
1967	0.18197230284851126
1968	0.19465642630479257
1969	0.06443154186843979
1970	-0.3499090207870069
1971	-0.04646252318163494
1972	0.5546536072615045
1973	0.529926618478846
1974	0.3298294900247031
1975	-0.25291259899841356
1976	-0.781214154963238
1977	-0.5489915330577243
1978	-0.20153478486398235
1979	-0.010062561812497997
1980	0.1896517518255892
1981	0.590107518528596
1982	0.8190354605082177
1983	0.6629190659515126
1984	0.5927117471727172
1985	0.670626580041074
1986	0.7529120938307442
1987	0.8601110112141692
1988	0.970244879906885
1989	1.039489067837382
1990	1.2572102517111758
1991	1.4682060813987188
1992	1.3089695608898895
1993	1.11292208961661
1994	1.0027764405302035
1995	0.8733731987301137
1996	0.6463913194562992
1997	0.44523887593507694
1998	0.501062479407547
1999	0.6804340869290574
2000	0.7688067141423678
2001	0.6628327701921918
2002	0.6587262533072461
2003	0.6441605621623745
2004	0.5933057638653861
2005	0.5426178777717672
2006	0.5294526344392431
2007	0.7955389941556121
2008	1.1723201298331076
2009	1.1549233454640202
2010	0.9430702448074778
2011	1.0209046653465415
2012	0.9783656956619426
2013	1.0701302679908038
2014	1.1365013493221081
2015	1.0546609528259947
2016	1.0120979023207963
2017	0.8493462280019662
2018	0.5993695180225871
2019	0.5146281720176935
2020	0.47800398280306666
2021	0.4544822333022963
2022	0.44494926349863023
2023	0.4152564315732078