Year	annual %
1961	1.5367546489395636
1962	1.5106732923663628
1963	1.5047206776196163
1964	1.4891819982547787
1965	1.3984839809139373
1966	1.1789909475820224
1967	1.2352228850093212
1968	1.1970680275665444
1969	1.1254028999487957
1970	1.0307323654808158
1971	1.0097112843535427
1972	1.0570381209901
1973	1.0447030256525807
1974	1.0445113891883722
1975	1.0440038819660202
1976	1.0817138081873594
1977	1.069669504049557
1978	1.0331811673597997
1979	1.0032297317944483
1980	1.0091281636980938
1981	1.0050112628416201
1982	0.9870918967110498
1983	1.002727460183948
1984	1.058769132010795
1985	1.038804216270691
1986	1.0219232153801983
1987	1.0161429900729928
1988	0.9691564566165312
1989	0.796827247959726
1990	0.6164308810439252
1991	0.5561686313683367
1992	0.3891193675573419
1993	0.31021717954197925
1994	0.21733630101834933
1995	0.12129788157768928
1996	0.1515919077114063
1997	0.1279812473917019
1998	0.06529693859754104
1999	-0.02298573228389955
2000	-0.0868290543472483
2001	-0.08749220909464839
2002	-0.07869905281540923
2003	0.01632227021926269
2004	0.06816985672124076
2005	0.08659429553219411
2006	0.11891843647960343
2007	0.07710985284703042
2008	0.263491083963288
2009	0.38128907452565386
2010	0.44042544227596636
2011	0.49646500143470007
2012	0.4606422305907074
2013	0.5050082755893186
2014	0.5085973900756073
2015	0.518232349032516
2016	0.5067871009300404
2017	0.4608942732210295
2018	0.4263407624738136
2019	0.4389811873070073
2020	0.2769837787435847
2021	0.15821699095917552
2022	-1.2296080172846473
2023	-0.0035332401577505834