Year	% of total population
1960	69.703
1961	69.445
1962	69.184
1963	68.923
1964	68.66
1965	68.396
1966	68.131
1967	67.86500000000001
1968	67.59700000000001
1969	67.328
1970	67.021
1971	66.507
1972	65.988
1973	65.467
1974	64.941
1975	64.44
1976	64.083
1977	63.725
1978	63.365
1979	63.003
1980	62.544
1981	61.606
1982	60.657
1983	59.7
1984	58.734
1985	57.765
1986	56.788
1987	55.805
1988	54.817
1989	53.828
1990	53.014
1991	53.099
1992	53.185
1993	53.27
1994	53.355
1995	53.44
1996	53.525
1997	53.61
1998	53.695
1999	53.78
2000	53.865
2001	53.95
2002	54.035
2003	54.12
2004	54.205
2005	54.29
2006	54.375
2007	54.46
2008	54.545
2009	54.629
2010	54.668
2011	54.478
2012	54.288
2013	54.097
2014	53.907
2015	53.716
2016	53.525
2017	53.318
2018	53.093
2019	52.851
2020	52.592
2021	52.316
2022	52.023
2023	51.713