Year	% of total population
1960	69.49
1961	68.203
1962	66.786
1963	65.338
1964	63.859
1965	62.357
1966	61.16
1967	60.996
1968	60.831
1969	60.666
1970	60.5
1971	60.335
1972	60.169
1973	60.003
1974	59.837
1975	59.67
1976	59.503
1977	59.072
1978	58.206
1979	57.335
1980	56.458
1981	55.58
1982	54.697
1983	53.811
1984	52.921
1985	52.032
1986	51.14
1987	50.278
1988	49.489
1989	48.702
1990	47.915
1991	47.129
1992	46.343
1993	45.561
1994	44.781
1995	44.003
1996	43.226
1997	42.456
1998	41.687
1999	40.882
2000	40.081
2001	39.288
2002	38.499
2003	37.716
2004	36.939
2005	36.17
2006	35.407
2007	34.652
2008	33.903000000000006
2009	33.17400000000001
2010	32.459999999999994
2011	31.763999999999996
2012	31.084999999999994
2013	30.424000000000007
2014	29.778999999999996
2015	29.152
2016	28.540999999999997
2017	27.947999999999993
2018	27.370999999999995
2019	26.811000000000007
2020	26.266999999999996
2021	25.739000000000004
2022	25.227999999999994
2023	24.732