Year	% of total population
1960	3.26172545758838
1961	3.21353123959935
1962	3.20050132394043
1963	3.22008912112914
1964	3.24029051716061
1965	3.25887154464743
1966	3.27679770857289
1967	3.2936605764424
1968	3.30626492230744
1969	3.31211812771491
1970	3.26137233392925
1971	3.17042025237257
1972	3.0973176388566
1973	3.03624931534383
1974	2.9853046486125
1975	2.94453807155035
1976	2.91421214793433
1977	2.89138333584506
1978	2.87485028259376
1979	2.86513285858769
1980	2.85170166635913
1981	2.84205471609293
1982	2.84422240116315
1983	2.85306277326627
1984	2.86988111585856
1985	2.89335750103578
1986	2.92514960151694
1987	2.96316506157247
1988	3.01320554796057
1989	3.075789843146
1990	3.14294529770667
1991	3.21820602755449
1992	3.30089547297916
1993	3.42298783499234
1994	3.58906791066562
1995	3.7708442588635
1996	3.96994069230178
1997	4.18254562408282
1998	4.40449220550434
1999	4.63468702459143
2000	4.87376650630144
2001	5.11991710218358
2002	5.37142286786081
2003	5.63003201424426
2004	5.89556511301879
2005	6.17054143906647
2006	6.45696631797901
2007	6.64542181498052
2008	6.73142445434723
2009	6.81819431761048
2010	6.90760740718751
2011	6.99569203215362
2012	7.07624654516287
2013	7.15356569669198
2014	7.23838605085267
2015	7.34906354707204
2016	7.49922806299006
2017	7.68265587324146
2018	7.874116175145
2019	8.02436444473177
2020	8.10377084289794
2021	8.15060734451533
2022	8.22120064541462
2023	8.36200798357566