Year	% of total population
1960	56.599
1961	54.772
1962	52.93
1963	51.08
1964	49.224
1965	47.375
1966	45.531
1967	43.7
1968	41.882
1969	40.092
1970	38.325
1971	36.588
1972	36.264
1973	36.111
1974	35.959
1975	35.807
1976	35.655
1977	35.504000000000005
1978	35.352999999999994
1979	35.202
1980	35.051
1981	34.900999999999996
1982	34.751000000000005
1983	34.601
1984	34.452
1985	34.303
1986	34.153999999999996
1987	34.006
1988	33.857
1989	33.709999999999994
1990	33.562
1991	33.415000000000006
1992	32.922
1993	32.396
1994	31.873999999999995
1995	31.355999999999995
1996	30.842
1997	30.334000000000003
1998	29.83
1999	29.331000000000003
2000	28.836
2001	28.348
2002	27.953999999999994
2003	27.578999999999994
2004	27.206000000000003
2005	26.837000000000003
2006	26.471000000000004
2007	26.108000000000004
2008	25.748000000000005
2009	25.391999999999996
2010	25.039
2011	24.689999999999998
2012	24.343999999999994
2013	24.003
2014	23.668000000000006
2015	23.337000000000003
2016	23.010000000000005
2017	22.688000000000002
2018	22.370999999999995
2019	22.058000000000007
2020	21.75
2021	21.445999999999998
2022	21.146
2023	20.851