Year	% of total population
1960	3.8746771523922434
1961	3.837587426309876
1962	3.819209349004003
1963	3.7958845709800095
1964	3.7746784569945104
1965	3.7738711452177376
1966	3.7902432634656242
1967	3.818994370601666
1968	3.8556973746512475
1969	3.891501307329393
1970	3.925107760756101
1971	3.964414835787976
1972	4.010194419714463
1973	4.060689279926569
1974	4.1228791732267025
1975	4.1900633330666155
1976	4.254828955506727
1977	4.321411636810161
1978	4.396026214296488
1979	4.473396589390089
1980	4.537584677667482
1981	4.584150691691569
1982	4.62057857745104
1983	4.657829272062861
1984	4.703042458010979
1985	4.7567153412239955
1986	4.815844003818315
1987	4.876831538787077
1988	4.94705233894599
1989	5.033924387245125
1990	5.124993722338298
1991	5.214611296587953
1992	5.3179637141408485
1993	5.441939201059731
1994	5.570766311848963
1995	5.70123648795772
1996	5.832806959908768
1997	5.9647233740043335
1998	6.1088299259427945
1999	6.25722066644357
2000	6.4061029601444845
2001	6.562509605341958
2002	6.724521357141127
2003	6.88228645730212
2004	7.025841156705236
2005	7.163543246035579
2006	7.303851997759661
2007	7.4324047715285415
2008	7.542114268805908
2009	7.650095934425244
2010	7.768690362701251
2011	7.913273205586101
2012	8.085669027261215
2013	8.284152510474508
2014	8.513854614070214
2015	8.78788534443978
2016	9.093139898081004
2017	9.431756818616554
2018	9.799689180547258
2019	10.177392399896528
2020	10.560620240591081
2021	10.914159641624375
2022	11.287380815945232
2023	11.683009728853092