Year	% of total population
1960	28.3184017387358
1961	28.2607302440722
1962	28.0437115441912
1963	27.6659425916445
1964	27.1500079839342
1965	26.5336886701664
1966	25.7958347958896
1967	25.0474977809044
1968	24.4870901916817
1969	24.1145477831553
1970	23.8470421871022
1971	23.6569689515046
1972	23.6222596421838
1973	23.7940683535845
1974	24.2024732761933
1975	24.776016174031
1976	25.4521866095201
1977	25.9729544213224
1978	26.2431110455554
1979	26.4918469294532
1980	26.7537297419843
1981	27.0195771591917
1982	26.7491256406518
1983	25.9175155493975
1984	25.1952756632451
1985	24.7036418458606
1986	24.4073223908527
1987	24.2307965228362
1988	24.0903163675963
1989	23.8835585709969
1990	23.5003853962961
1991	22.9941601137267
1992	22.4109876411799
1993	21.8110290904853
1994	21.2427432675514
1995	20.6768552479207
1996	20.1504750551998
1997	19.7331370977456
1998	19.4090814043726
1999	19.0557628332401
2000	18.6141080676253
2001	18.0758056280534
2002	17.4533073865271
2003	16.8555726556841
2004	16.3343574870091
2005	15.9696326570166
2006	15.8025326549878
2007	15.7425775745834
2008	15.7446279423705
2009	15.7790790703047
2010	15.8274113801917
2011	15.854675144292
2012	15.8469076855983
2013	15.7982170922689
2014	15.7327384494636
2015	15.719361407136
2016	15.7671324418547
2017	15.8601924690742
2018	15.9500082190944
2019	16.0020755768312
2020	16.0181197048859
2021	16.0267810949186
2022	15.9188797811963
2023	15.8389372000298