Year	% of total population
1960	41.599
1961	41.412
1962	41.224
1963	41.037
1964	40.85
1965	40.663
1966	40.477
1967	40.291
1968	40.105
1969	39.919
1970	39.734
1971	39.024
1972	38.2
1973	37.386
1974	36.577
1975	35.775999999999996
1976	34.982
1977	34.19799999999999
1978	33.42100000000001
1979	32.653999999999996
1980	31.894000000000005
1981	31.147000000000006
1982	30.586
1983	30.075000000000003
1984	29.566999999999993
1985	29.066999999999993
1986	28.569999999999993
1987	28.078999999999994
1988	27.592
1989	27.111999999999995
1990	26.635999999999996
1991	26.323999999999998
1992	26.173000000000002
1993	26.022999999999996
1994	25.873000000000005
1995	25.723
1996	25.573999999999998
1997	25.382000000000005
1998	25.144999999999996
1999	24.911
2000	24.677000000000007
2001	24.444999999999993
2002	24.215000000000003
2003	24.052999999999997
2004	23.959000000000003
2005	23.866
2006	23.772999999999996
2007	23.680000000000007
2008	23.587000000000003
2009	23.495000000000005
2010	23.403000000000006
2011	23.311000000000007
2012	23.218999999999994
2013	23.173000000000002
2014	23.138999999999996
2015	23.104
2016	23.069999999999993
2017	23.022999999999996
2018	22.962999999999994
2019	22.891000000000005
2020	22.805999999999997
2021	22.708
2022	22.599000000000004
2023	22.477000000000004