Year	% of total population
1960	2.948054578599444
1961	3.119845967941406
1962	3.2997676044448623
1963	3.4889976943904326
1964	3.689643123461104
1965	3.900039791849024
1966	4.123000248516089
1967	4.35931375025113
1968	4.609354281466721
1969	4.872467884248223
1970	5.148046596183685
1971	5.347731445025971
1972	5.473092352254394
1973	5.593945329882674
1974	5.717273126609848
1975	5.842793267579937
1976	5.973794341070803
1977	6.102401922116644
1978	6.228833694189288
1979	6.367981075219961
1980	6.584363005249795
1981	6.714200969672291
1982	6.816617314299729
1983	6.924297363353188
1984	7.036683632669397
1985	7.158646268769127
1986	7.299812692639551
1987	7.546676603321009
1988	7.840571710299447
1989	8.0588624166807
1990	8.231761378751196
1991	8.384833910040982
1992	8.545749217931311
1993	8.63009347854825
1994	8.536946569584545
1995	8.477412065408856
1996	8.538552035619398
1997	8.629462639613154
1998	8.608409936776123
1999	8.574588619274556
2000	8.540279556439891
2001	8.502454019918867
2002	8.462196146487933
2003	8.421778900172484
2004	8.382505067046687
2005	8.34669479376545
2006	8.315405559283375
2007	8.283869848438334
2008	8.34526138044183
2009	8.425683680191257
2010	8.5120030261263
2011	8.603917413752896
2012	8.706663953457934
2013	8.821224968696205
2014	8.955173037797886
2015	9.110761045813907
2016	9.279167582697202
2017	9.4694537425496
2018	9.302522937323218
2019	9.156346441270182
2020	9.0331047882467
2021	8.947026087667851
2022	8.9046858373847
2023	8.89508366936251