Year	% of total population
1960	4.46223548675527
1961	4.38291966717436
1962	4.31021512638634
1963	4.2452226563801
1964	4.18883861899963
1965	4.14072655038629
1966	4.10106005443247
1967	4.06960077779671
1968	4.04658285908727
1969	4.02931635656662
1970	4.01652009035675
1971	4.00896957181183
1972	4.00634735918569
1973	4.00845224980524
1974	4.01607457042144
1975	4.03129420834391
1976	4.05386217418112
1977	4.08168485585181
1978	4.11251911059608
1979	4.14295303016315
1980	4.17111059517354
1981	4.19665640965326
1982	4.21905488614135
1983	4.23837347324277
1984	4.25403379010454
1985	4.26559038957738
1986	4.27214364052488
1987	4.27365845160798
1988	4.26959259763957
1989	4.25992421488632
1990	4.24441087230547
1991	4.223748700919
1992	4.2017536091988
1993	4.17828450429475
1994	4.15201528150488
1995	4.12363003486581
1996	4.09341757259799
1997	4.07248401098306
1998	4.05578573533211
1999	4.03306610468609
2000	4.00989952341181
2001	3.99323704547524
2002	3.9725444416653
2003	3.94054344866534
2004	3.90660056272492
2005	3.87119329850846
2006	3.83667760734142
2007	3.80249712962019
2008	3.76742944757988
2009	3.73263091110824
2010	3.6978198477177
2011	3.66197802523473
2012	3.62251049524817
2013	3.57695268298022
2014	3.5122356196842
2015	3.46106616132799
2016	3.44049548297982
2017	3.42447302312265
2018	3.41213160842955
2019	3.40346876074181
2020	3.3868105650427
2021	3.35572461115234
2022	3.32410838740848
2023	3.30918426914921