Year	% of total population
1960	39.2344820349857
1961	38.9122169891619
1962	38.6520416182486
1963	38.4316522935429
1964	38.2347781373824
1965	38.0593450980166
1966	37.9104592102307
1967	37.790746274895
1968	36.4965212424268
1969	34.3621797276328
1970	32.7216489311738
1971	31.5895191182916
1972	30.7930310320923
1973	30.2224456794989
1974	29.8045552946916
1975	29.4830270485136
1976	29.2461293731286
1977	29.1628764353954
1978	29.2265200917501
1979	29.3694108219257
1980	29.5568848811891
1981	30.1811521750986
1982	31.1532414955268
1983	32.0335301703659
1984	32.8268610924911
1985	33.5153268925204
1986	33.7158038724121
1987	33.5255398630251
1988	33.3598229118224
1989	33.2147959639253
1990	33.086265249446
1991	32.9697572624345
1992	32.8607793761645
1993	32.7575334505173
1994	32.6576282597346
1995	32.5535705188358
1996	32.3776059329857
1997	32.1590579286622
1998	31.9744071643508
1999	31.8180130638182
2000	31.6836486549612
2001	31.5668933859611
2002	31.4652051446821
2003	31.3747183319641
2004	31.2913328920986
2005	30.9642645993581
2006	30.0241031044586
2007	28.8037511000193
2008	27.8159052811795
2009	27.2054278909457
2010	27.1969144179912
2011	27.5748976263541
2012	27.9354028848805
2013	28.2811388270385
2014	28.6123927124539
2015	28.927601400442
2016	29.2253072875454
2017	29.5073186847893
2018	29.7788585747156
2019	30.0471891213492
2020	30.277091624908
2021	30.4651769940562
2022	30.6465995751144
2023	30.8219476758695