Year	% of total population
1960	3.39807996600522
1961	3.42460238304819
1962	3.45164900352605
1963	3.47720641642763
1964	3.49899151981364
1965	3.51654366103493
1966	3.52965866304549
1967	3.53867065139544
1968	3.54475123905871
1969	3.54761790011682
1970	3.54677922685938
1971	3.5416486704844
1972	3.53176704870453
1973	3.51696238320884
1974	3.48739061531041
1975	3.44298645379255
1976	3.39214227727614
1977	3.33555010598944
1978	3.27471925499863
1979	3.21206912122373
1980	3.14915937892521
1981	3.08625504823247
1982	3.02499208249491
1983	2.96810087450415
1984	2.91760075048702
1985	2.8445154155969
1986	2.75393147853521
1987	2.67489396586103
1988	2.60531232271366
1989	2.54332673216488
1990	2.48816377287411
1991	2.43973286013465
1992	2.39869234130597
1993	2.36885264891393
1994	2.37015891123088
1995	2.3939416534111
1996	2.41509114652858
1997	2.43143443944303
1998	2.44294655521178
1999	2.44999135172533
2000	2.44999100993131
2001	2.4409666505029
2002	2.41916644980974
2003	2.38840681033065
2004	2.40346233375391
2005	2.46398684474187
2006	2.51733007582646
2007	2.55413083736984
2008	2.57115304494086
2009	2.56949209593789
2010	2.52934290729305
2011	2.48588187235529
2012	2.47535162916055
2013	2.48203936405462
2014	2.50603133864228
2015	2.5331861085628
2016	2.53439576905324
2017	2.52955070770659
2018	2.55699844158746
2019	2.63382816600793
2020	2.75632877019262
2021	2.79098129376342
2022	2.75863809568345
2023	2.80537741926593