Year	% of total population
1960	6.36736393537735
1961	6.13905708195111
1962	5.92062530753582
1963	5.72710515935731
1964	5.5703323081406
1965	5.44762533329611
1966	5.36408184103965
1967	5.3187139796355
1968	5.29202989575931
1969	5.26251862739094
1970	5.22315792684221
1971	5.1762805700534
1972	5.11650753555589
1973	5.05337581691746
1974	5.00807202038499
1975	4.97806997927755
1976	4.96211659997143
1977	4.96109589261438
1978	4.95735095651547
1979	4.92790008834649
1980	4.86438183261907
1981	4.7687974705821
1982	4.6410018121774
1983	4.4995262308024
1984	4.42102598500131
1985	4.42347032849785
1986	4.45171906453892
1987	4.49901212787632
1988	4.58685492214579
1989	4.69094190856919
1990	4.75184618682268
1991	4.79775561287531
1992	4.87055900687352
1993	4.94883845370304
1994	5.02920560167534
1995	5.094870917942
1996	5.12173248746139
1997	5.12427649414801
1998	5.11033203708248
1999	5.0808571830886
2000	5.06030983254518
2001	5.07593782043921
2002	5.12186914463663
2003	5.17714031522309
2004	5.21683693333126
2005	5.21745769662073
2006	5.16465797626546
2007	5.02989225868454
2008	4.79512816123725
2009	4.49736197344519
2010	4.21247301584639
2011	4.00607996400794
2012	3.89225722065561
2013	3.83564469994195
2014	3.8202967021202
2015	3.84582840129397
2016	3.89556916331342
2017	3.96296645110921
2018	4.04861770183938
2019	4.15722392930784
2020	4.26798253164187
2021	4.38525196340818
2022	4.54212221083901
2023	4.74545671177322