Year	annual %
1961	3.0246004824620694
1962	4.1517747175443915
1963	4.173335423276799
1964	4.1909627576637405
1965	4.218688802658431
1966	4.2510435347663
1967	4.286661255808181
1968	4.307542584241058
1969	4.29939255099984
1970	4.295981799801007
1971	4.282863642040743
1972	4.271672927595023
1973	4.217538023378578
1974	3.875024676635048
1975	3.786418412541357
1976	4.031761960550341
1977	4.015714683474543
1978	3.7775056308814454
1979	3.5127352033876265
1980	3.6214410788787808
1981	3.485740724463561
1982	3.286250993458268
1983	3.491626510622788
1984	3.709536616389523
1985	3.9360353292655597
1986	4.106584411048852
1987	4.258140637102873
1988	4.404458518733904
1989	4.630261800999044
1990	4.7435420367379795
1991	3.675205421298173
1992	2.94014187381085
1993	2.960308612655954
1994	2.996374884788527
1995	2.9872333218624467
1996	2.9526615272698873
1997	2.9262189750104546
1998	2.90009627948544
1999	2.775896935720678
2000	2.8074890925888667
2001	3.1099780066653127
2002	3.2977911637263957
2003	3.3071023961089576
2004	3.4956380152512665
2005	3.71486909467818
2006	3.8421356010889864
2007	3.7249403854941945
2008	3.561033704311222
2009	3.383763133481891
2010	3.375088751660061
2011	3.4686047379415683
2012	3.4302627879083807
2013	3.304223488787244
2014	3.206639786965497
2015	2.973230165870078
2016	2.7564196050519447
2017	2.718689499038094
2018	2.690019618385902
2019	2.6622072819325755
2020	2.713832584760008
2021	2.7888869135954213
2022	2.7176302568725808
2023	2.6126684232140414