Year	annual %
1961	1.5913458766472783
1962	1.2561447798793068
1963	1.2015379556148076
1964	1.19241483717105
1965	1.3154891550544152
1966	1.421072567638627
1967	1.475143467268717
1968	1.5581173019566086
1969	1.584391815125942
1970	0.9131614866374385
1971	-0.5173857512749018
1972	-0.6876489538840238
1973	-0.6827606097925973
1974	-0.6801677014050339
1975	-0.7239607970699812
1976	-0.803197440507976
1977	-0.9017327680201099
1978	-1.0129518238855602
1979	-1.1071622916288735
1980	-1.2481618892948454
1981	-2.0226869227530133
1982	-3.7925198036394834
1983	-3.9874518042560076
1984	-4.082081168252092
1985	-4.200306449970547
1986	-4.38771924665852
1987	-4.541891181286109
1988	-4.676732613448406
1989	-4.798662856974882
1990	-5.024998730227045
1991	-4.362285710360695
1992	-0.289530225703248
1993	-0.16348554750960193
1994	-0.20883245719825141
1995	-0.24213583742555045
1996	-0.29628432027748736
1997	-0.3715941517821539
1998	-0.4560538584285361
1999	-0.6001768526422068
2000	-0.7595345047128572
2001	-0.6211331316945756
2002	-0.7317002058312678
2003	-0.6296198120378413
2004	-0.7071433399595803
2005	-0.7557695705220616
2006	-0.8054674960238385
2007	-0.8651947675894645
2008	-0.904056570523549
2009	-0.9123043748555512
2010	-0.966278754759421
2011	-0.9480914675212168
2012	-0.7297616793357742
2013	-1.0531808983207396
2014	-0.1640997156584327
2015	-0.06571536098303457
2016	-0.896147870687786
2017	-0.5415690196295284
2018	-0.4200684013657013
2019	-0.18194010572806313
2020	-0.2543126535580007
2021	-0.4864314742281795
2022	-0.6198867251517851
2023	-0.6726482760950786