Year	% of total population
1960	55.956
1961	55.266
1962	54.339
1963	53.263
1964	52.182
1965	51.102
1966	50.02
1967	48.938
1968	47.855
1969	46.778
1970	45.702
1971	44.629
1972	43.561
1973	42.501
1974	41.447
1975	40.4
1976	39.836
1977	39.277
1978	38.719
1979	38.164
1980	37.612
1981	37.064
1982	36.519
1983	35.977999999999994
1984	35.43899999999999
1985	34.905
1986	34.373999999999995
1987	33.848
1988	33.324
1989	32.806
1990	32.291
1991	31.781000000000006
1992	31.274
1993	30.772999999999996
1994	30.275999999999996
1995	29.784000000000006
1996	29.295
1997	28.813000000000002
1998	28.476
1999	28.253
2000	28.031000000000006
2001	27.811000000000007
2002	27.590999999999994
2003	27.373000000000005
2004	27.155
2005	26.938999999999993
2006	26.724000000000004
2007	26.509
2008	26.296000000000006
2009	26.076999999999998
2010	25.851
2011	25.619
2012	25.381
2013	25.137
2014	24.887
2015	24.632000000000005
2016	24.372
2017	24.105999999999995
2018	23.836
2019	23.560000000000002
2020	23.281000000000006
2021	22.997
2022	22.709000000000003
2023	22.418000000000006