Year	% of total population
1960	53.732
1961	52.298
1962	50.857
1963	49.416
1964	47.973
1965	47.18
1966	46.413
1967	45.648
1968	44.883
1969	44.123
1970	43.365
1971	42.61
1972	41.857
1973	41.11
1974	40.393
1975	39.694
1976	38.997
1977	38.307
1978	37.621
1979	36.939
1980	36.262
1981	35.592
1982	34.92700000000001
1983	34.266999999999996
1984	33.613
1985	32.965999999999994
1986	32.434
1987	31.948999999999998
1988	31.468000000000004
1989	30.992000000000004
1990	30.519000000000005
1991	30.051000000000002
1992	29.584999999999994
1993	29.126000000000005
1994	28.671999999999997
1995	28.223
1996	27.777
1997	27.337999999999994
1998	26.902
1999	26.47
2000	26.043000000000006
2001	25.620999999999995
2002	25.203000000000003
2003	24.789
2004	24.379999999999995
2005	23.976
2006	23.576999999999998
2007	23.183999999999997
2008	22.796000000000006
2009	22.412999999999997
2010	22.036
2011	21.665000000000006
2012	21.299000000000007
2013	20.938999999999993
2014	20.584999999999994
2015	20.236000000000004
2016	19.891999999999996
2017	19.554000000000002
2018	19.221999999999994
2019	18.896
2020	18.575000000000003
2021	18.260000000000005
2022	17.950000000000003
2023	17.646