Year	% of total population
1960	28.809368026257896
1961	29.378585812126335
1962	29.69855662763954
1963	30.04600575742501
1964	30.42113645945566
1965	30.818842588740996
1966	31.24445529951247
1967	31.697051741161104
1968	32.179315472983575
1969	32.68803464793324
1970	33.22848229598498
1971	33.79771211807197
1972	34.000902532089185
1973	34.014468155795456
1974	34.04311585765171
1975	34.08444211603682
1976	34.13829253363086
1977	34.2012495300836
1978	34.28014370596897
1979	34.37554243922804
1980	34.49253253176124
1981	34.62723806091483
1982	34.52290598092767
1983	34.32895026625727
1984	34.158839546484174
1985	34.00939323896422
1986	33.8753281474723
1987	33.75625761955801
1988	33.662030863629525
1989	33.5921448038245
1990	33.551704990522055
1991	33.314499688374696
1992	33.00563692760272
1993	32.722592468390005
1994	32.46604231916581
1995	32.23290276336951
1996	32.02157441196237
1997	31.825925496192937
1998	31.646840030549928
1999	31.488140339867886
2000	31.34849743911929
2001	31.232610923632738
2002	31.036556140518968
2003	30.805294649230287
2004	30.594548877190224
2005	30.398336482145698
2006	30.22336181491008
2007	30.070041170063817
2008	29.941999008872145
2009	29.837176024252
2010	29.74776756221883
2011	29.671816819532776
2012	29.61939878303761
2013	29.58211605253579
2014	29.56344426295433
2015	29.5685718137699
2016	29.69928172581501
2017	30.21303595050988
2018	31.315173552109655
2019	32.55304498533965
2020	33.431437541551205
2021	34.11576019135126
2022	34.34099143740361
2023	34.052926957120754