Year	% of total population
1960	93.12
1961	92.565
1962	91.969
1963	91.32900000000001
1964	90.643
1965	89.91
1966	89.126
1967	88.288
1968	87.394
1969	86.446
1970	85.436
1971	84.364
1972	83.227
1973	82.029
1974	80.763
1975	79.431
1976	78.029
1977	76.673
1978	75.373
1979	74.025
1980	72.629
1981	71.19
1982	69.705
1983	68.178
1984	66.60900000000001
1985	65.006
1986	63.366
1987	61.695
1988	60.43
1989	60.553
1990	60.677
1991	60.801
1992	60.925
1993	61.048
1994	61.171
1995	61.295
1996	61.418
1997	61.541
1998	61.663
1999	61.786
2000	61.909
2001	61.384
2002	60.52
2003	59.649
2004	58.771
2005	57.889
2006	57.002
2007	56.11
2008	55.212
2009	54.314
2010	53.412
2011	52.507
2012	51.6
2013	50.694
2014	49.797
2015	48.911
2016	48.038
2017	47.176
2018	46.328
2019	45.493
2020	44.673
2021	43.867
2022	43.077
2023	42.301