Year	% of total population
1960	31.415877862595416
1961	31.14956818181819
1962	30.73216525821596
1963	30.351414725069898
1964	30.00522407407407
1965	29.666319214764837
1966	29.358406909613254
1967	29.0580067560189
1968	28.775984075839002
1969	28.51791114097228
1970	28.26738287829043
1971	28.001521677054996
1972	27.703981372200026
1973	27.450982904438366
1974	27.236254813135787
1975	27.043065638905983
1976	26.856398267358294
1977	26.674549785943185
1978	26.48433254851583
1979	26.274085505541443
1980	26.05827097015787
1981	25.914356008003647
1982	25.927510174666207
1983	25.92284167844665
1984	25.88633221410231
1985	25.832420458201895
1986	25.77773666689508
1987	25.728360156015494
1988	25.67697800077631
1989	25.6161922154204
1990	25.546001188591603
1991	25.54021995024214
1992	25.55923628320622
1993	25.586251949847583
1994	25.609996034787073
1995	25.631588463302474
1996	25.656244654395664
1997	25.68030044916269
1998	25.6961765322056
1999	25.70164314498985
2000	25.70146521508659
2001	25.708085361026946
2002	25.76059222968371
2003	25.802340638245873
2004	25.817756095999684
2005	25.802415269655377
2006	25.774876977958748
2007	25.85986313041601
2008	25.94399387965715
2009	26.03621411494298
2010	26.122612007243053
2011	26.209691582879913
2012	26.298911236013883
2013	26.394913207782782
2014	26.474442132074
2015	26.53984409014903
2016	26.615438219888976
2017	26.712683608416548
2018	26.830458476110202
2019	26.958688199607376
2020	27.137181167537854
2021	27.429134823689783
2022	27.379222905695443
2023	27.404482809070956