Year	annual %
1961	2.65791480826318
1962	3.08392380468414
1963	3.13299264561003
1964	3.17031371144904
1965	3.19266154842633
1966	3.07729541654786
1967	2.96529792452801
1968	3.01275362612308
1969	3.03076808536132
1970	2.5398309365879
1971	1.89513244798442
1972	1.68898653487845
1973	1.64691310717366
1974	1.67884237137463
1975	1.91522453936233
1976	2.09139141274887
1977	2.02583385934372
1978	1.96651796978601
1979	1.9441949642615
1980	2.59058703358443
1981	3.50472795584717
1982	3.76848671275937
1983	3.79507970941408
1984	3.82674891415651
1985	3.84212949822633
1986	3.85290720399011
1987	3.85710945946539
1988	3.86891020358364
1989	3.86747163673184
1990	3.25193894169625
1991	2.42548818245314
1992	2.19247704168662
1993	2.1649800672888
1994	2.15353086725101
1995	2.10625731450315
1996	2.03712292866293
1997	1.95867378307471
1998	1.82745478381229
1999	1.73564082713864
2000	1.09822902395737
2001	0.16129866050102
2002	-0.252358482783624
2003	-0.406483620024703
2004	-0.545139668053888
2005	-0.647634575615904
2006	-0.730998688583939
2007	-0.801982747478947
2008	-0.876432921866332
2009	-0.943767847051186
2010	-0.938173192497606
2011	-0.987558296772346
2012	-1.1462982343373
2013	-1.30478202241628
2014	-1.47894571116667
2015	-1.63927018758043
2016	-1.80723076890422
2017	-1.97181874740715
2018	-2.12293567392473
2019	-2.30413869890523
2020	-2.4212497099907
2021	-2.53017092647207
2022	-1.70649548061895
2023	-0.814183458237158