Year	% of total population
1960	7.07971334236112
1961	6.98897079833133
1962	6.44181990066975
1963	5.95862000447083
1964	5.53255158495424
1965	5.11418879502193
1966	4.70824949698189
1967	4.3663111161277
1968	4.09538529476706
1969	3.88425551769244
1970	3.71263525387931
1971	3.64906947983252
1972	3.685758415674
1973	3.7379666588401
1974	3.81076939844466
1975	3.8890971321826
1976	3.98054584946643
1977	4.10349373764008
1978	4.25304317774133
1979	4.44519904707836
1980	4.57574503311258
1981	4.62960132856517
1982	4.7113387022943
1983	4.80985841949007
1984	4.9169743061477
1985	5.05433582730283
1986	5.210173083716
1987	5.36753196893181
1988	5.5497589318828
1989	5.75115390341952
1990	5.94130208074688
1991	6.18763463490727
1992	6.47116757768257
1993	6.72090382205514
1994	6.97771845558792
1995	7.22353521147182
1996	7.42179659947817
1997	7.61780970837075
1998	7.84702695368607
1999	8.10650393686182
2000	8.40319822526228
2001	8.75506916282429
2002	9.16728165568969
2003	9.62316382074417
2004	10.1247857002333
2005	10.6295958903466
2006	11.1346342516747
2007	11.6931830451663
2008	12.3081835427584
2009	12.9805479632186
2010	13.7005144052307
2011	14.4573116103129
2012	15.2186154829966
2013	15.9560053047339
2014	16.6381319946219
2015	17.2537899974223
2016	17.8091296040189
2017	18.3105713247784
2018	18.7827099230993
2019	19.247915974471
2020	19.6445727655126
2021	20.0047956359713
2022	20.4172321922284
2023	20.88