Year	% of total population
1960	60.54
1961	59.557
1962	58.565
1963	57.566
1964	56.559
1965	55.55
1966	54.535
1967	53.516
1968	52.493
1969	51.47
1970	50.445
1971	49.281
1972	48.032
1973	46.79
1974	45.549
1975	44.315
1976	43.085
1977	41.868
1978	40.658
1979	39.639
1980	38.842
1981	38.054
1982	37.27
1983	36.494
1984	35.723
1985	34.962
1986	34.206999999999994
1987	33.459999999999994
1988	32.72
1989	32.358000000000004
1990	32.417
1991	32.477000000000004
1992	32.536
1993	32.596000000000004
1994	32.655
1995	32.715
1996	32.775000000000006
1997	32.834
1998	32.894000000000005
1999	32.95399999999999
2000	33.013999999999996
2001	33.081
2002	33.172
2003	33.263000000000005
2004	33.354
2005	33.364999999999995
2006	33.294
2007	33.223
2008	33.152
2009	33.158
2010	33.242999999999995
2011	33.259
2012	33.135999999999996
2013	33.013999999999996
2014	32.891999999999996
2015	32.769999999999996
2016	32.634
2017	32.483999999999995
2018	32.321
2019	32.144999999999996
2020	31.953999999999994
2021	31.751000000000005
2022	31.534999999999997
2023	31.305999999999997