Year	annual %
1961	1.4642017265858762
1962	1.5224081600678128
1963	1.5273786336185327
1964	1.522191026665307
1965	1.5135312653221535
1966	1.4605982725221056
1967	1.4026176828683115
1968	1.344621088836206
1969	1.2815639323397738
1970	1.2675311123504438
1971	1.2811040618283107
1972	1.2320168788221517
1973	1.1872398445156946
1974	1.1252561025774417
1975	1.0603362357710018
1976	0.9705716978135804
1977	0.9470738316527955
1978	0.9162480215581229
1979	0.791201391728
1980	0.5540006324539126
1981	0.642527387593965
1982	0.4341148042248749
1983	0.37757441129095
1984	0.3085303897325193
1985	0.22487215756823065
1986	0.13723086558824169
1987	0.06468356498882351
1988	0.035954434269261024
1989	-0.00014161202069316482
1990	0.22900331969490487
1991	0.5776017038600195
1992	0.5460842198916716
1993	0.519202970375904
1994	0.4820650781372173
1995	0.4289278515365036
1996	0.6408450552278548
1997	0.739642010648398
1998	0.6951359340045662
1999	0.6477992363652185
2000	0.47904719447881994
2001	0.2559165929384718
2002	0.2298531833664031
2003	0.1922616545844043
2004	0.16585213898712944
2005	0.12537571342525222
2006	0.051997145950811084
2007	0.007677422937336633
2008	-0.049591580763865356
2009	-0.08017163292343989
2010	0.005615949490304893
2011	0.08442553981913883
2012	0.04437429990231317
2013	-0.05361975694744732
2014	-0.14836436050932977
2015	-0.23275507587328198
2016	-0.2863989391823738
2017	-0.3497261910240193
2018	-0.49418693266422814
2019	-0.6016933155544621
2020	-0.7512094752554592
2021	-0.9306883760220421
2022	-0.8786916432385512
2023	-0.7760729363026647