Year	annual %
1961	4.554010282435907
1962	4.315775206606147
1963	4.2112202748441385
1964	4.103037563867186
1965	3.961168144388335
1966	3.8069881844394073
1967	3.642169857327768
1968	3.4805625559313254
1969	3.3137568009599563
1970	3.2027604837558696
1971	3.254503516331179
1972	3.3729504920546645
1973	3.3798847871492717
1974	3.3485614381800137
1975	3.294978118640878
1976	3.2412990297095434
1977	3.2149030030220924
1978	3.2444739556570963
1979	3.267176239321227
1980	2.997578901005473
1981	1.658751406700314
1982	1.6082171996883647
1983	1.5628893155850472
1984	1.4914099752713528
1985	1.6077585279902884
1986	1.718072256482093
1987	1.5754323923333726
1988	1.4083648085047262
1989	1.2675702079197493
1990	1.155905825971896
1991	1.1028835507428727
1992	1.0607350591507343
1993	0.992088821717727
1994	0.9058914945902345
1995	0.8258226645826067
1996	0.7619975479027902
1997	0.6890292064857995
1998	0.6630977433220384
1999	0.6657558781052685
2000	0.6265829815696078
2001	0.1415546150707707
2002	0.21309418425197982
2003	0.2245227831387015
2004	0.2213558544347674
2005	0.23747876679967508
2006	0.2286965234255769
2007	0.2296297403418246
2008	0.22686008161218518
2009	0.25241537884516835
2010	0.3002223688552513
2011	0.33674168380399366
2012	0.41979463547318474
2013	0.45798432142613954
2014	0.46828677406904373
2015	0.4776646561082367
2016	0.49533404287632693
2017	0.544895877661622
2018	1.7103589862347206
2019	1.0137578256523407
2020	-0.06818104744461502
2021	0.5895688257625367
2022	0.4928497801889682
2023	0.43936404536663864