Year	% of total population
1960	64.372
1961	63.825
1962	63.326
1963	62.824
1964	62.319
1965	61.812
1966	61.302
1967	60.79
1968	60.274
1969	59.758
1970	59.239
1971	58.717
1972	58.193
1973	57.243
1974	54.993
1975	52.723
1976	50.437
1977	48.157
1978	45.881
1979	43.622
1980	41.386
1981	39.191
1982	37.036
1983	36.178
1984	35.748000000000005
1985	35.322
1986	34.897999999999996
1987	34.476
1988	34.05500000000001
1989	33.638999999999996
1990	33.224000000000004
1991	32.812
1992	32.402
1993	32.208
1994	32.084999999999994
1995	31.962000000000003
1996	31.839
1997	31.717
1998	31.595
1999	31.473
2000	31.352000000000004
2001	31.230999999999995
2002	31.305999999999997
2003	31.447000000000003
2004	31.590000000000003
2005	31.732
2006	31.875
2007	32.018
2008	32.161
2009	32.30500000000001
2010	32.449
2011	32.593999999999994
2012	32.739000000000004
2013	32.863
2014	32.968999999999994
2015	33.054
2016	33.119
2017	33.164
2018	33.19
2019	33.19499999999999
2020	33.179
2021	33.144000000000005
2022	33.089
2023	33.013000000000005