Year	% of total population
1960	44.089
1961	43.665
1962	43.242
1963	42.819
1964	42.397
1965	41.978
1966	41.559
1967	41.141
1968	40.724
1969	40.309
1970	39.888
1971	39.461
1972	39.035
1973	38.612
1974	38.19
1975	37.769
1976	37.35
1977	36.934
1978	36.52
1979	36.107
1980	35.809
1981	35.628
1982	35.447
1983	35.266000000000005
1984	35.084999999999994
1985	34.905
1986	34.726
1987	34.547
1988	34.367999999999995
1989	34.19
1990	34.162000000000006
1991	34.287000000000006
1992	34.413
1993	34.539
1994	34.665000000000006
1995	34.791
1996	34.917
1997	35.044
1998	35.17100000000001
1999	35.298
2000	35.425
2001	35.33
2002	34.919
2003	34.510999999999996
2004	34.104
2005	33.635000000000005
2006	33.105000000000004
2007	32.57899999999999
2008	32.057
2009	31.540000000000006
2010	31.089
2011	30.641999999999996
2012	30.322000000000003
2013	30.046999999999997
2014	29.772999999999996
2015	29.5
2016	29.221000000000004
2017	28.938000000000002
2018	28.649
2019	28.355999999999995
2020	28.058000000000007
2021	27.754999999999995
2022	27.447999999999993
2023	27.135999999999996