Year	% of total population
1960	70.936
1961	69.94800000000001
1962	68.938
1963	67.90899999999999
1964	66.86
1965	65.798
1966	64.718
1967	63.623
1968	62.512
1969	61.391
1970	60.256
1971	59.251
1972	58.659
1973	58.067
1974	57.47
1975	56.872
1976	56.271
1977	55.67
1978	55.066
1979	54.461
1980	53.854
1981	53.297
1982	52.888
1983	52.479
1984	52.068
1985	51.659
1986	51.249
1987	50.839
1988	50.427
1989	50.018
1990	49.607
1991	49.244
1992	49.019
1993	48.796
1994	48.572
1995	48.349
1996	48.125
1997	47.902
1998	47.678
1999	47.455
2000	47.231
2001	47.008
2002	46.785
2003	46.563
2004	46.339
2005	46.117
2006	45.895
2007	45.672
2008	45.45
2009	45.228
2010	45.007
2011	44.785
2012	44.644
2013	44.531
2014	44.417
2015	44.304
2016	44.19
2017	44.058
2018	43.908
2019	43.74
2020	43.554
2021	43.349
2022	43.127
2023	42.887