Year	% of total population
1960	30.4609759569657
1961	30.8294674433819
1962	30.7703194863227
1963	30.5666512849688
1964	30.1150358702095
1965	29.5127625455153
1966	28.8931712256534
1967	28.2330778673879
1968	27.5857234053591
1969	26.9022185123191
1970	26.1480470780098
1971	25.4491574773418
1972	24.8302245531
1973	24.2101376097673
1974	23.6053004787135
1975	23.0443997589498
1976	22.539033241052
1977	22.1220642584193
1978	21.8027373925944
1979	21.638268589739
1980	21.6404385384886
1981	21.7357547618285
1982	21.9148354026031
1983	22.187767268978
1984	22.4728258551331
1985	22.6907082346393
1986	22.8581417212258
1987	22.9947005381389
1988	23.1038745240289
1989	23.1050940512975
1990	22.980548178672
1991	22.7966558697428
1992	22.5290561190237
1993	22.2029987520926
1994	21.8727145138599
1995	21.5109095352245
1996	21.0832596977749
1997	20.5464818527882
1998	19.8547987145778
1999	19.0861252791338
2000	18.320430382984
2001	17.5126129829303
2002	16.6637662297954
2003	15.9992727672749
2004	15.5697736786839
2005	15.2085851681157
2006	14.9362071305406
2007	14.8202549631652
2008	14.8747283715676
2009	15.0260237510162
2010	15.1605885062166
2011	15.3603646452539
2012	15.6987743912697
2013	16.0741100045898
2014	16.4601039456127
2015	16.8510270863284
2016	17.2113708069139
2017	17.4741102485831
2018	17.6066010083569
2019	17.6608351756578
2020	17.6804678846996
2021	17.719607735911
2022	17.7042504188661
2023	17.5729822027872