Year	annual %
1961	0.708741562839802
1962	0.614188134009926
1963	0.536194314138537
1964	0.488998529419177
1965	0.427760811564091
1966	0.689405004046871
1967	0.568473216639124
1968	0.507431317146919
1969	0.432901108958548
1970	0.388015145146731
1971	0.586344189699901
1972	0.568748867126879
1973	0.537331609581752
1974	0.52043158466485
1975	0.489819746380598
1976	0.709469484903307
1977	0.608072630953131
1978	0.535899599260452
1979	0.478502519397543
1980	0.408330497937078
1981	0.582381276293279
1982	0.471540112523836
1983	0.375637683447559
1984	0.280805158775381
1985	0.200093443669341
1986	0.425532557013849
1987	0.291506765323521
1988	0.185062841977923
1989	0.118788372709042
1990	0.0659326192540292
1991	0.126942857726194
1992	0.666421572481417
1993	0.689223724061183
1994	0.45784871504276
1995	-1.4229670890223
1996	-0.0992314596975416
1997	-0.279907993137813
1998	-0.379260986251296
1999	-0.361977304916285
2000	-0.319524801286905
2001	-0.171946646904854
2002	-0.0921469496277098
2003	-0.21273800909834
2004	-0.233328451597809
2005	-0.300431132565912
2006	-0.393204593401
2007	-0.405458541825536
2008	-0.425705551624613
2009	-0.400994905201716
2010	-0.402005900874718
2011	-0.789468997859736
2012	-0.485299545092705
2013	-0.486591387059998
2014	-0.469489291237153
2015	-0.494772574469842
2016	-0.523694463062603
2017	-0.532191341024444
2018	-0.546351968633598
2019	-0.536610017822353
2020	-0.666107601320794
2021	-0.943688169512831
2022	-2.5170575672922
2023	-0.699014137453456