Year	% of total population
1960	9.03027409817042
1961	9.25967605232376
1962	9.4973053827319
1963	9.7580986910372
1964	10.0566249926403
1965	10.3510222290461
1966	10.6460865688972
1967	10.9342899088174
1968	11.1770619048298
1969	11.3717657831281
1970	11.547990638432
1971	11.7374646393561
1972	11.9699512856647
1973	12.2263624298467
1974	12.4796052227077
1975	12.7044054570446
1976	12.8910138891508
1977	13.0886478590911
1978	13.2716391454479
1979	13.4255525105435
1980	13.406393443527
1981	13.1161814576307
1982	12.7394222647392
1983	12.3593226358435
1984	12.2053389281911
1985	12.3339019228798
1986	12.5323108097149
1987	12.7601675105315
1988	12.9970528351996
1989	13.1877007907679
1990	13.3670865800317
1991	13.5635018376834
1992	13.7193269026733
1993	13.8651848691477
1994	14.0295504907259
1995	14.2194044554028
1996	14.3948971056485
1997	14.5512005381958
1998	14.7246558109317
1999	14.8717881546659
2000	15.0023157099231
2001	15.1211564602123
2002	15.2263831895102
2003	15.3343051268118
2004	15.4494591976764
2005	15.5900235721843
2006	15.7446968237495
2007	15.9318013839321
2008	16.1344479129566
2009	16.3623669073119
2010	16.5612494461453
2011	16.7560537671912
2012	17.0364832056675
2013	17.3641899737732
2014	17.7269259186933
2015	18.0962513533286
2016	18.4745307602176
2017	18.8056808187934
2018	19.1435511641222
2019	19.6125829690153
2020	20.0974558160559
2021	20.4198836102052
2022	20.0106949645127
2023	19.7461875404862