Year	% of total population
1960	9.35943570652651
1961	9.60825064352031
1962	9.84621914242544
1963	10.0849039488425
1964	10.3511584761522
1965	10.6461995747589
1966	10.9618673494725
1967	11.285297149204
1968	11.5870735591867
1969	11.8455854091363
1970	12.0574659770611
1971	12.262787054799
1972	12.4951738483002
1973	12.7148781427294
1974	12.8987618843869
1975	13.0653530977767
1976	13.2127390992377
1977	13.3368439387692
1978	13.4456774979951
1979	13.5067524046368
1980	13.396995080993
1981	13.0680085265852
1982	12.6333067814697
1983	12.1722328368435
1984	11.8622705512857
1985	11.8236751498484
1986	11.9295950179953
1987	12.0866927675396
1988	12.2690299987811
1989	12.4283765275069
1990	12.5494693939561
1991	12.6541226375489
1992	12.7612809501505
1993	12.8758091995414
1994	13.0033588299539
1995	13.1543366943692
1996	13.3173560370296
1997	13.4659062911927
1998	13.5844919526892
1999	13.6735183913354
2000	13.7410537279513
2001	13.7868518894309
2002	13.8166098042912
2003	13.8470804776036
2004	13.9153020090929
2005	14.0548698248745
2006	14.2521481462792
2007	14.4821702893325
2008	14.7817047857111
2009	15.1374512906479
2010	15.4621338744006
2011	15.9031422123354
2012	16.5022105991263
2013	17.0868707916956
2014	17.6084010720933
2015	18.0884894449936
2016	18.5617924633372
2017	19.022300655047
2018	19.4417572658004
2019	19.8202815617653
2020	20.1648929510514
2021	20.4525880430708
2022	20.64345235452
2023	20.7875957750592