Year	% of total population
1960	23.526299990820583
1961	23.92976297742478
1962	24.33297770411632
1963	24.751352380264674
1964	25.188730372447797
1965	25.617283555544194
1966	26.073295885209504
1967	26.558254742317622
1968	27.074510357734347
1969	27.61791619357541
1970	28.17435947777308
1971	28.61603202720024
1972	29.024537776740683
1973	29.416334389256964
1974	29.78400184086674
1975	30.153980576745457
1976	30.546315829431563
1977	30.94686118394834
1978	31.359599286344423
1979	31.794531279091785
1980	32.25610521251683
1981	32.448277048688496
1982	32.58408306958954
1983	32.70263564419684
1984	32.8373179839958
1985	32.99149364255509
1986	33.16407665681127
1987	33.35501957328756
1988	33.56365321916858
1989	33.78695781191096
1990	34.00012089750591
1991	34.16398729208794
1992	34.28790085644436
1993	34.40808284631833
1994	34.53960022238285
1995	34.69227338104871
1996	34.86345958987699
1997	35.044595308543556
1998	35.24536263037238
1999	35.46686461698293
2000	35.69337258203018
2001	35.79549655519782
2002	35.895926987323705
2003	35.99989535101874
2004	36.11894366095085
2005	36.25059997476722
2006	36.396193211466574
2007	36.55847887979648
2008	36.737155214779186
2009	36.911647971221335
2010	36.994716968501
2011	37.13016868697991
2012	37.26814099545679
2013	37.42037466240241
2014	37.585169200808394
2015	37.7602144174823
2016	37.91802103876159
2017	38.08905471254363
2018	38.28399856730691
2019	38.40568099674637
2020	38.55903804197224
2021	38.75202759845745
2022	38.946802525839885
2023	39.10865272377008