Year	annual %
1961	-1.6199978503856887
1962	0.1966051395710336
1963	1.81407508102221
1964	1.6594792800861495
1965	2.641735513542291
1966	2.995869753659707
1967	2.7289446811103395
1968	2.76768535017213
1969	2.8953269253973968
1970	2.916759439737914
1971	2.877580693278431
1972	2.5878517050230134
1973	2.2833952811831972
1974	1.9354603781360513
1975	1.6357265804657053
1976	1.474672352626987
1977	1.290061014133668
1978	0.8764000133086502
1979	0.4567668875028895
1980	0.33954107030906555
1981	0.3340463629369722
1982	0.4863790935791831
1983	0.6287118835819705
1984	0.46983459427645563
1985	0.4954569075301408
1986	0.5952743244168934
1987	0.6836474323826763
1988	0.6615806204502181
1989	0.559447167139255
1990	0.46497503451559186
1991	0.1746438305164487
1992	-0.0036470201312153575
1993	-0.11601619806580113
1994	-0.17731868464439463
1995	-0.2615673315877441
1996	-0.34479096854529667
1997	-0.40703713076190984
1998	-0.5173994937865892
1999	-0.6547313622196177
2000	-0.7779359425167813
2001	-1.188186246226757
2002	-1.4701504963594967
2003	-1.5956390682351367
2004	-1.7037833181829756
2005	-1.7810266306328655
2006	-1.8112463408996207
2007	-1.8774898511064626
2008	-1.9632156108452485
2009	-2.0429850480030662
2010	-2.133474238732348
2011	-2.0169414601674296
2012	-1.8882069986545096
2013	-1.955320006219281
2014	-2.0572652427207063
2015	-2.169130105655632
2016	-2.2437799024791576
2017	-2.2646884943126513
2018	-2.4086964625962177
2019	-2.516079661033324
2020	-2.6242621985690233
2021	-2.7613220504546048
2022	-2.8484804764947524
2023	-2.914609883026772