Year	% of total population
1960	4.27911098459625
1961	4.26703601200151
1962	4.25605054345126
1963	4.24653865894752
1964	4.23718254227838
1965	4.22671370615318
1966	4.21609662449977
1967	4.20546487510145
1968	4.19264008803709
1969	4.17263909649787
1970	4.14437997660602
1971	4.11038681072594
1972	4.07070858470416
1973	4.02924896777619
1974	3.98910468944189
1975	3.95056193362435
1976	3.92359172557866
1977	3.90569787449311
1978	3.92532878708906
1979	3.94794293318737
1980	3.95509806161619
1981	3.98832886787284
1982	3.99424974428667
1983	3.96356351918597
1984	3.92808060682047
1985	3.88617694324854
1986	3.83483179586335
1987	3.77607244704854
1988	3.7058683768934
1989	3.54495485493801
1990	3.41056426865818
1991	3.37227512808902
1992	3.34021579175295
1993	3.30807780587872
1994	3.27533977691923
1995	3.24411093887673
1996	3.21671884133155
1997	3.19242612692102
1998	3.16918142369062
1999	3.14846811029212
2000	3.13389671278917
2001	3.12666568807142
2002	3.12762605737282
2003	3.13959043032225
2004	3.16151006068612
2005	3.19056583106836
2006	3.22613283880964
2007	3.26735161446121
2008	3.31328396658117
2009	3.36282432657557
2010	3.41597235801675
2011	3.47146715076696
2012	3.52692309466798
2013	3.58102254015632
2014	3.63860738359011
2015	3.70231970505155
2016	3.76828392770445
2017	3.8355768696024
2018	3.90459165296472
2019	3.97587389586023
2020	4.03264556076137
2021	4.02808054303489
2022	3.969010669017
2023	3.93318874482945