Year	% of total population
1960	72.356
1961	71.731
1962	71.09700000000001
1963	70.455
1964	69.803
1965	69.145
1966	68.479
1967	67.804
1968	67.122
1969	66.43299999999999
1970	65.85900000000001
1971	65.68299999999999
1972	65.505
1973	65.328
1974	65.15100000000001
1975	64.973
1976	64.794
1977	64.61500000000001
1978	64.436
1979	64.256
1980	64.118
1981	64.24600000000001
1982	64.374
1983	64.50200000000001
1984	64.63
1985	64.757
1986	64.884
1987	65.011
1988	65.138
1989	65.265
1990	65.39099999999999
1991	65.52600000000001
1992	65.717
1993	65.907
1994	66.096
1995	66.285
1996	66.47399999999999
1997	66.661
1998	66.84899999999999
1999	67.035
2000	67.22200000000001
2001	67.402
2002	67.545
2003	67.688
2004	67.83
2005	67.97200000000001
2006	68.114
2007	68.256
2008	68.39699999999999
2009	68.537
2010	68.678
2011	68.818
2012	68.938
2013	69.036
2014	69.115
2015	69.173
2016	69.21000000000001
2017	69.227
2018	69.224
2019	69.201
2020	69.157
2021	69.094
2022	69.009
2023	68.904