Year	% of total population
1960	26.388999999999996
1961	25.783
1962	25.233000000000004
1963	24.691000000000003
1964	24.156000000000006
1965	23.631
1966	23.111999999999995
1967	22.602000000000004
1968	22.099000000000004
1969	21.605999999999995
1970	21.120000000000005
1971	20.679000000000002
1972	20.257000000000005
1973	19.842
1974	19.433000000000007
1975	19.031000000000006
1976	18.634
1977	18.245000000000005
1978	17.861000000000004
1979	17.483999999999995
1980	17.113
1981	16.686999999999998
1982	16.241
1983	15.805999999999997
1984	15.379000000000005
1985	14.962000000000003
1986	14.555000000000007
1987	14.156999999999996
1988	13.766999999999996
1989	13.387
1990	13.016000000000005
1991	12.671999999999997
1992	12.457999999999998
1993	12.248000000000005
1994	12.040000000000006
1995	11.835999999999999
1996	11.634
1997	11.436000000000007
1998	11.241
1999	11.048000000000002
2000	10.858000000000004
2001	10.671000000000006
2002	10.489999999999995
2003	10.313999999999993
2004	10.14
2005	9.968999999999994
2006	9.799999999999997
2007	9.634
2008	9.469999999999999
2009	9.308999999999997
2010	9.150999999999996
2011	9.010000000000005
2012	8.879000000000005
2013	8.751000000000005
2014	8.623000000000005
2015	8.497
2016	8.373000000000005
2017	8.251000000000005
2018	8.129999999999995
2019	8.009
2020	7.888999999999996
2021	7.771000000000001
2022	7.653000000000006
2023	7.537000000000006