Year	% of total population
1960	62.9
1961	61.218
1962	59.506
1963	57.77
1964	56.013
1965	54.245
1966	52.767
1967	51.501
1968	50.232
1969	48.966
1970	47.7
1971	46.64
1972	45.581
1973	44.529
1974	43.481
1975	42.438
1976	41.474
1977	40.572
1978	39.674
1979	38.784
1980	37.9
1981	37.397
1982	36.896
1983	36.397
1984	35.900999999999996
1985	35.41
1986	35.001000000000005
1987	34.653999999999996
1988	34.30800000000001
1989	33.965
1990	33.623000000000005
1991	33.283
1992	32.944
1993	32.67
1994	32.443
1995	32.218
1996	31.992999999999995
1997	31.769000000000005
1998	31.546000000000006
1999	31.322999999999993
2000	31.101
2001	30.834000000000003
2002	30.476
2003	30.120999999999995
2004	29.766999999999996
2005	29.415999999999997
2006	29.067999999999998
2007	28.721999999999994
2008	28.378
2009	28.037000000000006
2010	27.697999999999993
2011	27.361999999999995
2012	27.025000000000006
2013	26.686999999999998
2014	26.349000000000004
2015	26.010000000000005
2016	25.671000000000006
2017	25.331000000000003
2018	24.992000000000004
2019	24.653000000000006
2020	24.313999999999993
2021	23.974999999999994
2022	23.637
2023	23.299000000000007