Year	% of total population
1960	44.8190197841727
1961	44.8583679691184
1962	44.9158131526129
1963	44.9827266218555
1964	45.0541633640225
1965	45.1430740288458
1966	45.2425505099219
1967	45.340615155292
1968	45.4471162935361
1969	45.5752278078486
1970	45.7328750875122
1971	46.1406542201061
1972	46.7352846574461
1973	47.2389945186708
1974	47.6799979183472
1975	48.014434959288
1976	48.1726663122331
1977	48.2029753664688
1978	48.1646982258826
1979	48.0719532476621
1980	47.9346765496345
1981	47.7610027002775
1982	47.5534465534466
1983	47.3180546410524
1984	47.0474501936266
1985	46.7252374552375
1986	46.3978152184345
1987	46.1062886193702
1988	45.829762480234
1989	45.5597430692762
1990	45.3054796781323
1991	45.0547607818477
1992	44.7915258253844
1993	44.5258278014773
1994	44.2691379667466
1995	44.0238119987526
1996	43.7818110234181
1997	43.531977750885
1998	43.2776341741293
1999	43.0143871077775
2000	42.7855113685917
2001	42.6018687768935
2002	42.4240810807513
2003	42.2514155499641
2004	42.0821984590438
2005	41.9189365080023
2006	41.7714182066536
2007	41.6357687681201
2008	41.4952684200224
2009	41.3432455499698
2010	41.1846182457783
2011	41.0342934438101
2012	40.9028422976156
2013	40.7802666712457
2014	40.6496416408105
2015	40.5061534945973
2016	40.3487013255809
2017	40.1746178728905
2018	39.9847402119685
2019	39.783153306775
2020	39.5719414546352
2021	39.3373040371491
2022	39.1094512079362
2023	38.89079845413