Year	annual %
1961	1.501786612966077
1962	0.7081783114153909
1963	0.35532874090814764
1964	0.06842711224664605
1965	-0.1929601295862698
1966	-0.46212534625107976
1967	-0.7098242687195867
1968	-0.9946548473635247
1969	-1.4106414988151128
1970	-0.8625495287769862
1971	-0.34580662783722294
1972	0.13716079352268545
1973	0.12393596054936429
1974	0.0847098737651903
1975	0.13018292537004872
1976	0.16898483158135447
1977	0.19462832146130452
1978	0.18778132237904416
1979	0.07113525698486882
1980	-0.03232793484981325
1981	-0.6943345762473844
1982	-0.7254222577473812
1983	-0.8166536430003837
1984	-0.8767325021571817
1985	-0.9181447067110696
1986	-0.967433043404959
1987	-1.0180812884578687
1988	-1.0771353192275597
1989	-1.1590689737634277
1990	-1.2366337856036418
1991	-0.6276768111065761
1992	0.32859519530204767
1993	0.7743440815833227
1994	0.7683940383220536
1995	0.7416251720412993
1996	0.7154050307231451
1997	0.7240661913420601
1998	0.746144407004739
1999	0.7744603926554782
2000	0.8356406871826177
2001	0.6021696236854471
2002	0.15996804051159857
2003	-0.07995203304172838
2004	-0.12004803362497818
2005	-0.13355594639642468
2006	-0.127043579656394
2007	-0.1473050149186998
2008	-0.14081203922556723
2009	-0.16789231975060526
2010	-0.20184357253048837
2011	-0.0741115075188128
2012	-0.08091160848674502
2013	-0.22960571945561925
2014	-0.20980685169065386
2015	-0.18988205895075475
2016	-0.12225770727461997
2017	-0.06118495041143453
2018	-0.040810774610777714
2019	-0.027216438896996147
2020	-0.006805267279503739
2021	0.1292209517724304
2022	0.3798932728363333
2023	0.5469475804535476