Year	% of total population
1960	60.0344717457527
1961	59.45789729975844
1962	59.072776349678385
1963	58.82348437954229
1964	58.72967148692762
1965	58.71637470174573
1966	58.67201945558765
1967	58.59362730955207
1968	58.5732745707096
1969	58.678062890427675
1970	58.86507612892652
1971	59.06740453189654
1972	59.272366425311986
1973	59.49923172230404
1974	59.74492371593527
1975	60.02493179319732
1976	60.31351590542441
1977	60.56398845639046
1978	60.81710052956222
1979	61.05099768956761
1980	61.26151960294175
1981	61.501424838497364
1982	61.73494551050288
1983	61.960008906219336
1984	62.10979909177981
1985	62.188974299835664
1986	62.25608019826362
1987	62.303582898260515
1988	62.338361822514884
1989	62.33672719265586
1990	62.32026033709505
1991	62.320370505483695
1992	62.298706141134986
1993	62.26659460527919
1994	62.30296758208448
1995	62.42016852669718
1996	62.63698333430942
1997	62.94891875383016
1998	63.356061137911745
1999	63.82707111696894
2000	64.28583526091488
2001	64.71997230347235
2002	65.11366170913044
2003	65.4779218359036
2004	65.8420219263163
2005	66.20969148120882
2006	66.57002324485322
2007	66.92034945270696
2008	67.26646949027578
2009	67.5805215381011
2010	67.85396115933302
2011	68.04355597125432
2012	68.11414634453229
2013	68.08091710606075
2014	67.94256226166054
2015	67.73326868666467
2016	67.51249697088028
2017	67.28448141506863
2018	66.99644855073261
2019	66.6924518627569
2020	66.46748969145048
2021	66.31630263389914
2022	65.94708487256385
2023	65.66504389832653