Year	annual %
1961	1.5909061980760877
1962	1.6014853904691748
1963	1.6110047797405516
1964	1.6161870197524149
1965	1.628071417589415
1966	1.6385810970249968
1967	1.6518512641487022
1968	1.6659128011875313
1969	1.681526387469954
1970	1.688992543808171
1971	1.702775611983091
1972	1.7124516561076084
1973	1.7206034178569534
1974	1.7286262853426142
1975	1.7216516927220988
1976	1.7183853100120061
1977	0.8360984556343148
1978	0.5072065847437521
1979	0.45377698968187247
1980	0.3848906229541653
1981	0.3230337064424322
1982	0.2516976434406384
1983	0.18927019820083993
1984	0.12668883804293707
1985	0.08552006039339828
1986	0.03812957551653848
1987	0.0012021900105827705
1988	-0.0414522599315457
1989	-0.08495169773900638
1990	-0.1452467150866333
1991	-0.20761672874804274
1992	-0.19753721381881392
1993	0.73398685458633
1994	0.6719031411798296
1995	0.6010080577426297
1996	0.5576260239943424
1997	0.5153481420655436
1998	0.4848016690160557
1999	0.47282702284627304
2000	0.4444442942661507
2001	0.4023250097556632
2002	0.47754164985140773
2003	0.4890017691504904
2004	0.4713445016822394
2005	0.4600858331976399
2006	0.4606450959365963
2007	0.45841492165837316
2008	0.4239380619296216
2009	0.4017939870580139
2010	0.3764705932691591
2011	0.3463739818805517
2012	0.31441347393536684
2013	0.4477752620447857
2014	0.5201122191865488
2015	0.4843902728219619
2016	0.4497688932091109
2017	0.4200994401126208
2018	0.3654086862587727
2019	0.31279830364120803
2020	0.1750748682968085
2021	0.00832792275871182
2022	-0.019376809889021233
2023	0.1084730134715614