Year	% of total population
1960	36.2642995984539
1961	36.428063279863
1962	36.4060163693357
1963	36.2121910260362
1964	35.8867915804329
1965	35.4651740502556
1966	34.9722437830987
1967	34.4268157814435
1968	33.8407378167632
1969	33.2284331027813
1970	32.5982640836936
1971	31.972327967185
1972	31.3814569744423
1973	30.8267598903172
1974	30.2940198254608
1975	29.7739589721767
1976	29.2641121453999
1977	28.7704364322391
1978	28.3100886893
1979	27.9032292626481
1980	27.5624889173961
1981	27.2540805960326
1982	26.9653482263706
1983	26.7264501413663
1984	26.5246863475073
1985	26.3405896576704
1986	26.1706567658884
1987	26.0084543336646
1988	25.8482874710834
1989	25.695950538957
1990	25.5536522745906
1991	25.3949090653072
1992	25.124927210433
1993	24.7631656696646
1994	24.4108065616588
1995	24.0619049766203
1996	23.7032467409369
1997	23.322403854121
1998	22.912496075898
1999	22.4932659852964
2000	22.0792026836164
2001	21.6866356535269
2002	21.3213388817155
2003	20.9946524994406
2004	20.7263351015856
2005	20.4845976815345
2006	20.233026899272
2007	19.9717528652643
2008	19.7346177509021
2009	19.5381046988032
2010	19.3354187663618
2011	19.0984950648002
2012	18.8872767654397
2013	18.7281872022122
2014	18.6171407760906
2015	18.5247170000308
2016	18.4250316021688
2017	18.3323108352123
2018	18.2554720886461
2019	18.2183103953705
2020	18.2062562843029
2021	18.1815647952524
2022	18.095146970295
2023	17.9283765200895