Year	% of total population
1960	11.6688558752463
1961	11.7447857238677
1962	11.8537452480358
1963	11.9274730985735
1964	12.0353644623479
1965	12.1757923673566
1966	12.3343987238771
1967	12.5157390514451
1968	12.672348193265
1969	12.7978162578514
1970	12.9251582327791
1971	13.0550457337758
1972	13.170670601671
1973	13.287767850724
1974	13.4140481844488
1975	13.5453430627208
1976	13.6550132788075
1977	13.7781796890803
1978	13.9209176950904
1979	14.0390371807375
1980	13.9842951061207
1981	13.698181836156
1982	13.3707600009028
1983	13.0996727583533
1984	12.9071028807134
1985	12.9585899758558
1986	13.2024980622526
1987	13.4364007510468
1988	13.6604489899154
1989	13.8763052275186
1990	14.0963545977793
1991	14.3287088386132
1992	14.5583981288142
1993	14.784878706838
1994	15.0146056536421
1995	15.2543625906591
1996	15.4862657870067
1997	15.7001018864947
1998	15.8808226421591
1999	16.0284620249503
2000	16.1551236977579
2001	16.2620850567542
2002	16.3557138787457
2003	16.4245865418333
2004	16.5070426551427
2005	16.5758309737471
2006	16.5901608935778
2007	16.6276860262502
2008	16.7250619639092
2009	16.8488559537893
2010	16.9822788586235
2011	17.2677039206929
2012	17.7116185064849
2013	18.1749858451496
2014	18.6484201991835
2015	19.1050644612113
2016	19.5271629592367
2017	19.9283842010908
2018	20.3102307122097
2019	20.676325207027
2020	21.0095477123755
2021	21.3232552180298
2022	21.6584199627435
2023	21.9999629690164