Year	% of total population
1960	33.789
1961	33.358999999999995
1962	32.932
1963	32.507000000000005
1964	32.084
1965	31.665999999999997
1966	31.25
1967	30.837000000000003
1968	30.426000000000002
1969	30.019999999999996
1970	29.616
1971	29.215999999999994
1972	28.817999999999998
1973	28.424000000000007
1974	28.033
1975	27.646
1976	27.260999999999996
1977	26.879999999999995
1978	26.503
1979	26.129000000000005
1980	25.67
1981	24.956999999999994
1982	24.257000000000005
1983	23.570999999999998
1984	22.897000000000006
1985	22.238
1986	21.592
1987	20.959999999999994
1988	20.340999999999994
1989	19.736999999999995
1990	19.052000000000007
1991	18.114000000000004
1992	17.211
1993	16.346000000000004
1994	15.515
1995	14.719999999999999
1996	13.956999999999994
1997	13.229
1998	12.533000000000001
1999	11.869
2000	11.412999999999997
2001	11.509
2002	11.605999999999995
2003	11.703000000000003
2004	11.802000000000007
2005	11.900000000000006
2006	12
2007	12.099999999999994
2008	12.200999999999993
2009	12.302999999999997
2010	12.406000000000006
2011	12.498000000000005
2012	12.579999999999998
2013	12.652000000000001
2014	12.712000000000003
2015	12.762
2016	12.802000000000007
2017	12.829999999999998
2018	12.846999999999994
2019	12.852999999999994
2020	12.846999999999994
2021	12.831000000000003
2022	12.804000000000002
2023	12.765