Year	% of total population
1960	4.79800392843871
1961	4.6204517913184
1962	4.46296015755189
1963	4.34619929105947
1964	4.26845070692915
1965	4.2053757706737
1966	4.2331153082972
1967	4.33897072194945
1968	4.42618963979788
1969	4.41733912132591
1970	4.32999921652608
1971	4.24617750064064
1972	4.15894239722178
1973	4.06366546750718
1974	3.97683461027349
1975	3.90605686032138
1976	3.82769169547591
1977	3.724110295775
1978	3.59034726309594
1979	3.53826850690088
1980	3.56746446101606
1981	3.57333333333333
1982	3.57114502119822
1983	3.56978548536762
1984	3.55921178496269
1985	3.5468009833903
1986	3.51346204552779
1987	3.46052669201956
1988	3.42075892857143
1989	3.3872801672193
1990	3.33584031627919
1991	3.30561791886389
1992	3.31508379171133
1993	3.32585264089515
1994	3.3377354729393
1995	3.35479040997539
1996	3.35440019799231
1997	3.33477644602857
1998	3.3092669964862
1999	3.27761802747196
2000	3.24681538522159
2001	3.23646043896566
2002	3.24406517351284
2003	3.25816662513322
2004	3.28140588626538
2005	3.30365510777882
2006	3.33023590419951
2007	3.35496774446558
2008	3.36937075582402
2009	3.37467156624574
2010	3.3746932728367
2011	3.36077473025061
2012	3.33773825788967
2013	3.33109759864444
2014	3.34826281688916
2015	3.3845587006722
2016	3.43759756313653
2017	3.50150586769135
2018	3.56408190640553
2019	3.62480984538115
2020	3.6856484282026
2021	3.7428030479383
2022	3.81044185275639
2023	3.90218327528742