Year	% of total population
1960	30.9537446101427
1961	30.9032992287686
1962	30.7224819032039
1963	30.601567443519
1964	30.7218735506281
1965	30.9456489462737
1966	31.0213259244364
1967	30.9794777235798
1968	30.9193407602246
1969	30.931221844632
1970	31.0122675108825
1971	31.0661390174503
1972	31.0554784707886
1973	31.0633902918741
1974	31.0851730258704
1975	31.049588186146
1976	30.9616444308647
1977	30.8550520538004
1978	30.7127422160952
1979	30.5560461565358
1980	30.4325929184726
1981	30.316796977366
1982	30.1757469549828
1983	29.9983328068766
1984	29.7220712755423
1985	29.3440326501832
1986	28.9441882975632
1987	28.5339101232319
1988	28.0966572613728
1989	27.6288000982972
1990	27.1017648175253
1991	26.5648768711636
1992	26.0385753522805
1993	25.4753927292213
1994	24.8430106499766
1995	24.1557437640418
1996	23.508121488507
1997	22.9354422207876
1998	22.4522632790628
1999	22.0693287998922
2000	21.7261012050968
2001	21.3729081451171
2002	21.0835698461132
2003	20.9200104579654
2004	20.7715017617386
2005	20.5787103343662
2006	20.3654877737625
2007	20.2854053617638
2008	20.4440870835175
2009	20.7521346817659
2010	21.1021452796223
2011	21.3799710903353
2012	21.5203360681776
2013	21.5379098646453
2014	21.4750979924462
2015	21.3611823154213
2016	21.2000752790494
2017	20.9914763728601
2018	20.7463346314319
2019	20.4581926663275
2020	20.1778202263229
2021	19.9131720159486
2022	19.5842275754147
2023	19.1909050829114