Year	% of total population
1960	66.4685316213864
1961	66.6141863791381
1962	66.8233348738156
1963	67.04999276654
1964	67.2201562770457
1965	67.3119935952041
1966	67.3437800035973
1967	67.3612441533356
1968	67.3064607417998
1969	67.1494466234202
1970	66.9724919753698
1971	66.8228555943758
1972	66.6930110309554
1973	66.5088572111075
1974	66.2323772015198
1975	65.9470672006488
1976	65.7100767719176
1977	65.5197036747719
1978	65.3609193965239
1979	65.2337079570651
1980	65.1980890821844
1981	65.2422201856086
1982	65.3354138600087
1983	65.5278278752267
1984	65.7308358754247
1985	65.8091023442493
1986	65.7572039089306
1987	65.644899954939
1988	65.5639462799979
1989	65.5489452468814
1990	65.5831423641852
1991	65.6832262617881
1992	65.8398492802797
1993	66.0111602628823
1994	66.2247179786408
1995	66.4741805134355
1996	66.7245520257634
1997	66.9937145429922
1998	67.258295064425
1999	67.4414298125002
2000	67.5823165157625
2001	67.7630370807309
2002	67.983061665419
2003	68.2299158743477
2004	68.4614090227647
2005	68.6263466748831
2006	68.6797872170564
2007	68.6116678696451
2008	68.4561766367906
2009	68.1949885493741
2010	67.8165990485721
2011	67.3438612353227
2012	66.8147924294076
2013	66.2646818282592
2014	65.7766946008836
2015	65.3815810328647
2016	65.0297347858456
2017	64.6912182975438
2018	64.3341933581227
2019	63.987962053912
2020	63.7158377398358
2021	63.5841598752808
2022	63.6262076720378
2023	63.7258275133353