Year	% of total population
1960	5.76661163542286
1961	5.96544542504544
1962	6.16618150031748
1963	6.37621926209373
1964	6.58549985939059
1965	6.84844175237696
1966	7.14734806394143
1967	7.42756023841557
1968	7.70813324350569
1969	7.97120425440938
1970	8.23106914912236
1971	8.48530697567299
1972	8.76180335371798
1973	9.03685972908603
1974	9.28822908271894
1975	9.53189519474461
1976	9.72139229007693
1977	9.89672159533556
1978	10.0462785395595
1979	10.1514998270593
1980	10.1223447401286
1981	9.9598744467899
1982	9.7779692988773
1983	9.56762387094499
1984	9.44042244504941
1985	9.42392067792711
1986	9.43605819915552
1987	9.51660085720103
1988	9.69889487157489
1989	9.89282852455861
1990	10.0885320110499
1991	10.2740202389834
1992	10.4313151140168
1993	10.6205759805637
1994	10.845050739328
1995	11.1050479106187
1996	11.366579319175
1997	11.5988813403705
1998	11.8060164710046
1999	12.0034813753925
2000	12.1716835654577
2001	12.3465445987935
2002	12.5630958078207
2003	12.752114876026
2004	12.9242617675667
2005	13.0923725949077
2006	13.2284503461531
2007	13.3034015077174
2008	13.3364669686906
2009	13.3675359080803
2010	13.4056174784836
2011	13.6117328032707
2012	14.0185205131995
2013	14.4993832457173
2014	15.0099531846206
2015	15.5367476366261
2016	16.1080683027695
2017	16.6879982701496
2018	17.2577379051075
2019	17.8328107053429
2020	18.3740401768053
2021	18.8362631970932
2022	18.5545625689627
2023	18.5309254902386