Year	% of total population
1960	68.485
1961	67.936
1962	67.402
1963	66.863
1964	66.32
1965	65.773
1966	65.051
1967	64.241
1968	63.423
1969	62.599
1970	61.766
1971	61.055
1972	60.4
1973	59.742
1974	59.08
1975	58.414
1976	57.913
1977	57.492
1978	57.069
1979	56.645
1980	56.22
1981	54.811
1982	53.003
1983	51.188
1984	49.366
1985	47.552
1986	46.07
1987	44.739
1988	43.413
1989	42.101
1990	40.797
1991	40.024
1992	39.482
1993	38.945
1994	38.41
1995	37.877
1996	37.347
1997	36.821
1998	36.297
1999	35.777
2000	35.259
2001	34.66
2002	34.025999999999996
2003	33.397999999999996
2004	32.775000000000006
2005	32.16
2006	31.549999999999997
2007	30.947000000000003
2008	30.349000000000004
2009	29.759
2010	29.174999999999997
2011	28.598
2012	28.025999999999996
2013	27.468999999999994
2014	26.923000000000002
2015	26.388999999999996
2016	25.866
2017	25.355999999999995
2018	24.857
2019	24.370000000000005
2020	23.894999999999996
2021	23.430999999999997
2022	22.977999999999994
2023	22.537000000000006