Year	% of total population
1960	14.724999999999994
1961	14.307000000000002
1962	13.899000000000001
1963	13.5
1964	13.219999999999999
1965	12.945999999999998
1966	12.677000000000007
1967	12.412000000000006
1968	12.152000000000001
1969	11.897000000000006
1970	11.646
1971	11.400000000000006
1972	11.322000000000003
1973	11.245000000000005
1974	11.168000000000006
1975	11.090999999999994
1976	11.015
1977	10.939999999999998
1978	10.864999999999995
1979	10.790000000000006
1980	10.637
1981	10.486000000000004
1982	10.337000000000003
1983	10.188999999999993
1984	10.043999999999997
1985	9.900000000000006
1986	9.599999999999994
1987	8.944000000000003
1988	8.328999999999994
1989	7.753
1990	7.213999999999999
1991	6.709000000000003
1992	6.236999999999995
1993	5.796999999999997
1994	5.385999999999996
1995	5.001999999999995
1996	4.6440000000000055
1997	4.340999999999994
1998	4.111999999999995
1999	3.894999999999996
2000	3.688999999999993
2001	3.4939999999999998
2002	3.308000000000007
2003	3.132000000000005
2004	2.9099999999999966
2005	2.603999999999999
2006	2.3289999999999935
2007	2.0829999999999984
2008	1.8610000000000042
2009	1.6640000000000015
2010	1.4989999999999952
2011	1.3979999999999961
2012	1.3029999999999973
2013	1.2150000000000034
2014	1.132000000000005
2015	1.0550000000000068
2016	0.9849999999999994
2017	0.921999999999997
2018	0.8649999999999949
2019	0.8119999999999976
2020	0.7650000000000006
2021	0.7219999999999942
2022	0.6820000000000022
2023	0.6460000000000008