Year	% of total population
1960	25.9249145614153
1961	25.6006033249354
1962	25.2490462358691
1963	24.9939320388349
1964	24.8397997820376
1965	24.7507291841933
1966	24.7004024564914
1967	24.652238090532
1968	24.5886327535219
1969	24.5484332052292
1970	24.4869852548537
1971	24.385416985606
1972	24.2830939981139
1973	24.1591058369719
1974	23.991250520653
1975	23.7951583625216
1976	23.5525624122414
1977	23.2552077343576
1978	22.9286367802949
1979	22.5671598546647
1980	22.1702927424313
1981	21.7532719758713
1982	21.3300052904897
1983	20.8885446213055
1984	20.4241642776117
1985	20.0075614594339
1986	19.6368315037015
1987	19.2961321564945
1988	19.0630201586687
1989	18.9526963568653
1990	18.9404063597638
1991	19.0029931580768
1992	19.1153062936058
1993	19.2527090982288
1994	19.3733794709136
1995	19.4827075016645
1996	19.6005600808854
1997	19.7110389031841
1998	19.8057032831036
1999	19.9148391159628
2000	20.0089998188681
2001	20.0362448790069
2002	20.0155119465675
2003	19.9448651117401
2004	19.8163024573648
2005	19.6415892158837
2006	19.4477576316686
2007	19.2535889373492
2008	19.0810866127004
2009	18.9490618476209
2010	18.811487152387
2011	18.6281444803042
2012	18.4415854296107
2013	18.2894534449551
2014	18.1343202171072
2015	17.9809421568634
2016	17.8728636262208
2017	17.7818022820929
2018	17.6388658815734
2019	17.4377979755542
2020	17.2111656129486
2021	16.966313845532
2022	16.707318801123
2023	16.4339027758496