Year	% of total population
1960	40.452
1961	39.937
1962	39.445
1963	38.956
1964	38.468
1965	37.984
1966	37.502
1967	37.022
1968	36.544
1969	36.07
1970	35.598
1971	34.705
1972	33.516000000000005
1973	32.351
1974	31.206000000000003
1975	30.083
1976	28.982
1977	27.908
1978	26.858000000000004
1979	25.833
1980	24.833
1981	24.519000000000005
1982	24.548000000000002
1983	24.576999999999998
1984	24.605999999999995
1985	24.635000000000005
1986	24.664
1987	24.692999999999998
1988	24.721999999999994
1989	24.751000000000005
1990	24.78
1991	24.842
1992	24.97
1993	25.099000000000004
1994	25.227999999999994
1995	25.357
1996	25.486999999999995
1997	25.617999999999995
1998	25.748999999999995
1999	25.879999999999995
2000	26.012
2001	26.123000000000005
2002	26.191000000000003
2003	26.260000000000005
2004	26.328999999999994
2005	26.397999999999996
2006	26.467
2007	26.537000000000006
2008	26.605999999999995
2009	26.676000000000002
2010	26.745000000000005
2011	26.814999999999998
2012	26.802999999999997
2013	26.709999999999994
2014	26.616
2015	26.522999999999996
2016	26.430000000000007
2017	26.325000000000003
2018	26.208
2019	26.078999999999994
2020	25.938999999999993
2021	25.786
2022	25.623000000000005
2023	25.447999999999993