Year	annual %
1961	1.3754972498721434
1962	1.7860189568627436
1963	1.8388071139829407
1964	1.8606479573698684
1965	1.8806768528653681
1966	1.753139581379162
1967	1.6316151433513535
1968	1.669617507026386
1969	1.6926907487583378
1970	1.1917596988587167
1971	0.5347938870082414
1972	0.30961694187109773
1973	0.2716721848735109
1974	0.29553032222178804
1975	0.5273174276710516
1976	0.6825965070399891
1977	0.6176223084378574
1978	0.5538179337076363
1979	0.5268842269091457
1980	0.8207004138012295
1981	0.6846916135963655
1982	0.9251193094557483
1983	0.928188587483594
1984	0.9196524179743
1985	0.9226103373292632
1986	0.9029406719394157
1987	0.8948605576014015
1988	0.8648462819913827
1989	0.8574307779632235
1990	-0.2849941641787485
1991	-2.624705831514916
1992	-2.915658429145558
1993	-2.9912734226474877
1994	-3.0711887589959983
1995	-3.1430622037207865
1996	-3.2844948796455373
1997	-3.4096490961778185
1998	-3.57230287019558
1999	-3.704659109808559
2000	-2.8187595320941963
2001	1.0030775024212004
2002	0.5792812337041557
2003	0.4285826408049166
2004	0.2945076491796586
2005	0.17628915980294685
2006	0.10269200638396726
2007	0.029321214108321194
2008	-0.043985045793809394
2009	-0.10270707380740321
2010	-0.10281266970124736
2011	-0.25012887314494897
2012	-0.5021425408603966
2013	-0.7281405229734081
2014	-1.0042803435859033
2015	-1.2430052416199657
2016	-1.5060988545499732
2017	-1.7494979175079626
2018	-1.9894027628121056
2019	-2.2597076277709855
2020	-2.463506738654283
2021	-2.6640919824586597
2022	-1.9044866701876895
2023	-1.117528259957007