Year	annual %
1961	5.838865683048154
1962	5.844540383673344
1963	5.853355274285624
1964	6.492150888367089
1965	8.403976723312441
1966	8.322342375779142
1967	8.271233859594542
1968	8.261979724083254
1969	8.24790607094221
1970	8.28679881146517
1971	8.269440970903002
1972	8.359494590229422
1973	8.085920865020018
1974	7.968110218373084
1975	7.764023601893723
1976	7.559446343518121
1977	7.365063989532976
1978	7.265659013721164
1979	3.0909098708751777
1980	1.1633821185044662
1981	1.055180758591414
1982	5.763237225024468
1983	6.013274122068309
1984	2.287244284856537
1985	1.9728414242028685
1986	4.0121034430394795
1987	4.522940472773121
1988	4.3993871241572755
1989	4.37862315464813
1990	3.730904646648719
1991	4.642772823386801
1992	5.224120363502738
1993	3.091378748455705
1994	2.368840468997538
1995	4.543465760008753
1996	4.575234503775819
1997	3.5696329495420294
1998	3.5603089774080825
1999	3.630031250139227
2000	3.5671241095649058
2001	3.4825209957009067
2002	3.595700247380275
2003	4.122533258864427
2004	4.587731965735417
2005	4.1432645783964634
2006	3.692013796953749
2007	3.5428041775584616
2008	3.596653239273833
2009	3.6691467231397388
2010	3.640735801028905
2011	3.807791690334885
2012	3.88585227998914
2013	4.034612028682556
2014	4.1257939212315
2015	3.8212691320244296
2016	3.8655980214511576
2017	4.119566293509382
2018	4.253642660406279
2019	4.244124880151057
2020	4.190490624275432
2021	4.2674619067798885
2022	4.293859526892297
2023	4.336164325751649