Year	annual %
1961	-0.06602839460753947
1962	-0.04404316301101611
1963	-0.11019284861566439
1964	-0.33130897229601264
1965	-0.332410278383856
1966	0
1967	0.3766482795476865
1968	0.4413069827588641
1969	0.02201430938995489
1970	-0.2865647282323615
1971	-0.2209945650802844
1972	-0.31021518340871646
1973	-0.24441740864690814
1974	1.7641030803900937
1975	3.479732521413001
1976	3.4851069075711596
1977	3.4071431910524543
1978	3.256732866254472
1979	2.2629666410392457
1980	1.1494379425735213
1981	0.6247723373097251
1982	0.23785575206286919
1983	0.018273184153176896
1984	-0.12798246559048276
1985	0.1827819920326099
1986	0.07301935337216851
1987	0
1988	-0.018249840364545546
1989	-0.1826818191642951
1990	-0.36636787636743384
1991	-0.42298913642212943
1992	-0.12909176527628705
1993	-0.16622037255869576
1994	-0.2776494148292207
1995	-0.4644690189324712
1996	-0.44792908040460566
1997	-0.543938319452586
1998	-0.6983136804031345
1999	-0.7032244127774329
2000	-0.7658471282229252
2001	-0.9462270077993187
2002	-0.8965174059880454
2003	-0.9243845938351869
2004	-0.7138638286801466
2005	-0.7791468843773323
2006	-0.866155077654392
2007	-0.9145475794846227
2008	-0.9435967448172347
2009	-0.8693906964133866
2010	-0.856044480158249
2011	-0.8422875654348553
2012	-0.8921044721169669
2013	-1.7432917542075612
2014	-2.5061764522296657
2015	-2.524931248784199
2016	-2.5200732529025336
2017	-2.48916490205492
2018	-1.9145138256639955
2019	-1.4044828623548629
2020	-1.1731071759084406
2021	-0.9586349901669603
2022	-1.1472401162236807
2023	-1.3682929365442713