Year	% of total population
1960	7.024589672871528
1961	6.918321931048216
1962	6.85044051896973
1963	6.92115569324008
1964	6.993307395469543
1965	7.065634243744699
1966	7.143730265445142
1967	8.327201119748166
1968	9.71367941537368
1969	11.32994136869456
1970	13.415765760729817
1971	15.994641238984256
1972	18.842278241440766
1973	22.13646101489122
1974	26.111072860158114
1975	1.48634303429796
1976	1.5855092068934133
1977	1.6555751410094737
1978	1.6775165642179342
1979	1.6523987542235312
1980	3.843661492195706
1981	5.872050344474766
1982	5.836911920013281
1983	5.804667331787069
1984	5.789639017877882
1985	5.788974917605398
1986	5.995339965700414
1987	6.195034678908676
1988	6.427559137002435
1989	6.6704912233541105
1990	6.901731021474148
1991	6.904968182473047
1992	6.8398569078786595
1993	6.745708274963269
1994	7.1452874871678285
1995	7.654955415655329
1996	8.222318721243301
1997	8.845225008045702
1998	9.320171595405533
1999	9.393238393190154
2000	9.478653940587222
2001	9.567657886990249
2002	9.657652789465569
2003	9.74979101027471
2004	9.84419543665435
2005	9.940661678562691
2006	10.040756715182821
2007	10.140540967777053
2008	10.263156158454514
2009	10.428080764410762
2010	10.601480193033302
2011	10.77812127651618
2012	10.958209572965867
2013	11.143395497091506
2014	11.335426624355549
2015	11.536295421774302
2016	11.742571834232516
2017	11.955354564795002
2018	12.18283934379009
2019	12.426249769708878
2020	12.671676162387188
2021	12.92174349266982
2022	13.188602325809129
2023	13.462504719729788