Year	% of total population
1960	7.540000000000006
1961	7.445999999999998
1962	7.320999999999998
1963	7.165000000000006
1964	7.0120000000000005
1965	6.8629999999999995
1966	6.715999999999994
1967	6.572000000000003
1968	6.430999999999997
1969	6.293000000000006
1970	6.1569999999999965
1971	6.024000000000001
1972	5.8940000000000055
1973	5.766999999999996
1974	5.641999999999996
1975	5.519999999999996
1976	5.400000000000006
1977	5.194000000000003
1978	4.9950000000000045
1979	4.804000000000002
1980	4.619
1981	4.465000000000003
1982	4.3629999999999995
1983	4.263000000000005
1984	4.165000000000006
1985	4.069999999999993
1986	3.977000000000004
1987	3.885000000000005
1988	3.7960000000000065
1989	3.7079999999999984
1990	3.6230000000000047
1991	3.5390000000000015
1992	3.4579999999999984
1993	3.378
1994	3.299999999999997
1995	3.222999999999999
1996	3.149000000000001
1997	3.0759999999999934
1998	3.004000000000005
1999	2.9350000000000023
2000	2.870999999999995
2001	2.813999999999993
2002	2.7590000000000003
2003	2.7039999999999935
2004	2.6500000000000057
2005	2.596999999999994
2006	2.5460000000000065
2007	2.4950000000000045
2008	2.444999999999993
2009	2.3970000000000056
2010	2.3490000000000038
2011	2.3020000000000067
2012	2.2560000000000002
2013	2.2109999999999985
2014	2.1670000000000016
2015	2.1239999999999952
2016	2.081000000000003
2017	2.0390000000000015
2018	1.9989999999999952
2019	1.9590000000000032
2020	1.9210000000000065
2021	1.8829999999999956
2022	1.8469999999999942
2023	1.811000000000007