Year	% of total population
1960	24.0321301104504
1961	23.9999013740744
1962	24.1007818586196
1963	24.1048393271189
1964	24.0893790736362
1965	24.1186365656075
1966	24.1489830205064
1967	24.0893094335772
1968	23.9654270027837
1969	23.8173027990651
1970	23.7666485958209
1971	23.7326488467112
1972	23.508297912541
1973	23.1854873071727
1974	22.835987161455
1975	22.4338590947763
1976	21.952882340569
1977	21.4271618119657
1978	20.8788102700832
1979	20.2984786277368
1980	19.7428104229185
1981	19.2366964275526
1982	18.765654944678
1983	18.3442450381235
1984	17.9691415680805
1985	17.6398306970947
1986	17.3677041138287
1987	17.1685713969198
1988	17.0670203321233
1989	17.0387171932264
1990	17.0977054522607
1991	17.2048989661084
1992	17.3448414481858
1993	17.508813643822
1994	17.605812741475
1995	17.6506262807608
1996	17.6657720966871
1997	17.6331161398039
1998	17.5595131327515
1999	17.4790181873296
2000	17.3796260932972
2001	17.1084794134546
2002	16.8111916750956
2003	16.6123246405644
2004	16.3877761070055
2005	16.148712087318
2006	15.8962061589215
2007	15.6442988401868
2008	15.427906395523
2009	15.2651690724755
2010	15.1643116776099
2011	15.0795817763206
2012	14.9810874243253
2013	14.9186417975347
2014	14.8864754852682
2015	14.8657853212347
2016	14.8833713249582
2017	14.9357400481111
2018	14.9947371721949
2019	15.0388162864858
2020	15.0597381778765
2021	15.0657088700201
2022	15.0464929125109
2023	15.0032699877647