Year	annual %
1961	6.077906356213806
1962	6.077386434325701
1963	6.079759186030729
1964	6.076117305670127
1965	6.067622490651952
1966	6.064843319542254
1967	6.059366830001584
1968	6.0632140026165455
1969	6.022937237335993
1970	5.9395498412668015
1971	5.849187756523608
1972	5.7494761034187425
1973	5.64948179608776
1974	5.572095566942483
1975	5.48779103929432
1976	5.429509820208471
1977	5.373744910577093
1978	5.37866895373208
1979	5.432764146014651
1980	5.51360145494622
1981	5.571765818307505
1982	5.668555241135315
1983	4.690368493948797
1984	3.2882948477438103
1985	3.408695739383959
1986	3.529635719197454
1987	3.6356546957813443
1988	3.6800645134286936
1989	3.6469955049946203
1990	4.512849559000359
1991	5.049651497776659
1992	4.235093085933526
1993	4.088151960426175
1994	4.025384811720559
1995	3.7993008388563885
1996	3.8310082693153924
1997	2.999977568434086
1998	2.7889691328013417
1999	3.1489260080335186
2000	2.854697254937484
2001	2.182922843936102
2002	2.434005881580083
2003	3.1226267962787575
2004	3.00555734579613
2005	2.8505156274449694
2006	2.9333271269501946
2007	3.15931511582049
2008	3.269765247092815
2009	3.296938481892589
2010	3.3141240956833613
2011	3.322836103488385
2012	3.2959829186303558
2013	3.2853487351342805
2014	3.3217901869004134
2015	3.420999074506371
2016	3.4931684206883777
2017	3.4982137212696434
2018	3.498230942078764
2019	3.5288469434459526
2020	3.534396424805212
2021	3.4937015726281
2022	3.4692528221433245
2023	3.463074455208555