Year	% of total population
1960	72.28999999999999
1961	71.469
1962	70.539
1963	69.593
1964	68.628
1965	67.649
1966	66.65299999999999
1967	65.029
1968	63.154
1969	61.244
1970	59.296
1971	57.739
1972	56.308
1973	54.869
1974	53.421
1975	51.967
1976	50.281
1977	48.524
1978	46.767
1979	45.019
1980	43.28
1981	41.593
1982	39.939
1983	38.307
1984	36.699
1985	35.123999999999995
1986	33.321
1987	31.436999999999998
1988	29.611000000000004
1989	27.852000000000004
1990	26.156000000000006
1991	25.028000000000006
1992	24.180000000000007
1993	23.355000000000004
1994	22.548000000000002
1995	21.760999999999996
1996	21.337999999999994
1997	21.095
1998	20.855000000000004
1999	20.616
2000	20.379000000000005
2001	20.060000000000002
2002	19.700999999999993
2003	19.348
2004	18.998000000000005
2005	18.655
2006	18.471999999999994
2007	18.369
2008	18.266999999999996
2009	18.165000000000006
2010	18.063999999999993
2011	18.076999999999998
2012	18.149
2013	18.221000000000004
2014	18.293000000000006
2015	18.366
2016	18.438000000000002
2017	18.497
2018	18.540999999999997
2019	18.569999999999993
2020	18.586
2021	18.586
2022	18.572999999999993
2023	18.543999999999997