Year	annual %
1961	2.261320278148908
1962	2.2939140475287725
1963	2.257010495466788
1964	2.2368262056235655
1965	2.214308110617323
1966	2.176362572971335
1967	2.123344467779382
1968	2.0707486155079486
1969	2.025170737979565
1970	1.9912371637229531
1971	1.9947221079726671
1972	2.0513487316068613
1973	1.5815336049801267
1974	1.6232521219440743
1975	1.6119335093392022
1976	1.5886792012394197
1977	1.584188978393581
1978	1.582454812456852
1979	1.615539225054819
1980	1.6821892733802821
1981	1.7614608588391785
1982	1.7988796579757587
1983	1.4992019921075888
1984	1.4810226770085335
1985	1.4706676728376558
1986	1.4514296233178559
1987	1.41937483739649
1988	1.3801486086348604
1989	1.325969025891368
1990	1.2526931648981308
1991	1.182307481205509
1992	1.0944079784156422
1993	1.1902672359180135
1994	1.1381217984717418
1995	1.0531937247861376
1996	0.9608166081418792
1997	0.8735172799565507
1998	0.7757247156130607
1999	0.6616063004678029
2000	0.5087723087608633
2001	0.26577326230645265
2002	-0.021964631801573018
2003	0.3821231775227958
2004	0.40601230478703026
2005	0.34056536321203906
2006	0.27492041486965146
2007	0.21877591287508014
2008	0.1945467976689842
2009	0.22376796989771747
2010	0.35922875507373847
2011	0.5013209887106365
2012	0.5468351124881097
2013	0.6544462526008713
2014	0.7081537803216925
2015	0.7212800939233213
2016	0.7193495182552156
2017	0.7013647165789404
2018	0.6348069697183771
2019	0.5683148492522487
2020	0.5480850921017741
2021	0.44650610289662634
2022	0.2789447512144351
2023	0.2900736247655904