Year	annual %
1961	0.3591960621270829
1962	1.0649256990616323
1963	1.702152858810166
1964	1.6324175130863097
1965	1.9710083023369123
1966	2.058670966914562
1967	1.970357486064799
1968	1.9914990431664705
1969	2.047359074866634
1970	2.05164866535155
1971	2.0281471722828144
1972	1.867657178211914
1973	1.7430796564523519
1974	1.59283893140028
1975	1.4658379357311446
1976	1.4080326432553818
1977	1.3279248941474293
1978	1.1364871861666757
1979	0.9644864625389289
1980	0.9430884898622907
1981	0.944856176447999
1982	1.0199971282728484
1983	1.0665622555376757
1984	0.9976033724585989
1985	0.9910665536370544
1986	1.0182685872652826
1987	1.0439365492113524
1988	1.0172679366477837
1989	0.9768725926676325
1990	0.94978821075307
1991	0.8431196170260336
1992	0.7355520561871884
1993	0.6587819064683771
1994	0.609149562978061
1995	0.5661919322426741
1996	0.5224279507375513
1997	0.4798039057216812
1998	0.4175404733669694
1999	0.3405123790940081
2000	0.2540328672926364
2001	0.12131765013437246
2002	-0.026965538560858704
2003	-0.08231662174644327
2004	-0.12752199784708296
2005	-0.1758844576594214
2006	-0.21146838323274153
2007	-0.2552044193211316
2008	-0.26791599589653003
2009	-0.27910994564437885
2010	-0.30434759336965556
2011	-0.23848616583228477
2012	-0.19108883570234525
2013	-0.20945510140346357
2014	-0.262885218854521
2015	-0.31812351245073955
2016	-0.36295175661855694
2017	-0.4020151173221507
2018	-0.47528975203159973
2019	-0.5428417256712379
2020	-0.6289333469593146
2021	-0.7682186812038196
2022	-0.9511597670309015
2023	-0.8229912688513679