Year	% of total population
1960	34.5514282695985
1961	35.1659267219854
1962	35.5227450264469
1963	35.546920539706
1964	35.2589726178093
1965	34.6616589902972
1966	33.9064072993484
1967	33.1651926593458
1968	32.429340353674
1969	31.6898097934205
1970	30.9529551566365
1971	30.2355666792933
1972	29.5425661224649
1973	28.8567513425687
1974	28.1788950750217
1975	27.532000063369
1976	26.9471372161084
1977	26.4764353069878
1978	26.1433649840114
1979	25.9690755776126
1980	25.9393674267164
1981	25.9952566450692
1982	26.1252159648027
1983	26.3596971473449
1984	26.6854094465629
1985	27.0013451314264
1986	27.2422350509701
1987	27.3939567948602
1988	27.4300366088628
1989	27.3164777149128
1990	27.0933084772918
1991	26.831584344214
1992	26.5462851025451
1993	26.2176243171256
1994	25.8328402127604
1995	25.3716490614755
1996	24.8343921655819
1997	24.2470878497934
1998	23.5722748461365
1999	22.7899104018123
2000	22.0921527161829
2001	21.5138622750001
2002	20.9054928077206
2003	20.3182866949586
2004	19.783590073179
2005	19.2831876586639
2006	18.8544766239181
2007	18.5082810936631
2008	18.2493569704508
2009	18.1075838930202
2010	17.9964254118742
2011	17.8565622099807
2012	17.7359769878483
2013	17.6710554757231
2014	17.829583686366
2015	18.197601260516
2016	18.5890739671014
2017	18.9441554268409
2018	19.2404157185748
2019	19.4759045773086
2020	19.6493213439759
2021	19.8060170703541
2022	19.3115573621233
2023	19.0548063974509