Year	% of total population
1960	83.92699999999999
1961	83.195
1962	82.031
1963	80.806
1964	79.51599999999999
1965	78.167
1966	76.753
1967	75.276
1968	73.736
1969	72.139
1970	70.482
1971	69.795
1972	69.439
1973	69.083
1974	68.723
1975	68.361
1976	67.99600000000001
1977	67.63
1978	67.262
1979	66.89099999999999
1980	66.518
1981	66.143
1982	65.174
1983	64.113
1984	63.037
1985	61.951
1986	60.851
1987	59.74
1988	58.618
1989	57.489
1990	56.352
1991	55.207
1992	54.236
1993	53.283
1994	52.327
1995	51.369
1996	50.408
1997	49.45
1998	48.491
1999	47.533
2000	46.576
2001	45.623
2002	44.445
2003	43.234
2004	42.028
2005	40.835
2006	39.652
2007	38.48
2008	37.32
2009	36.177
2010	35.048
2011	33.93600000000001
2012	32.84
2013	31.792
2014	30.787000000000006
2015	29.825999999999993
2016	28.908
2017	28.031999999999996
2018	27.197000000000003
2019	26.402
2020	25.646
2021	24.927000000000007
2022	24.245000000000005
2023	23.599000000000004