Year	% of total population
1960	39.38707748348008
1961	39.54491187339207
1962	39.68153575983173
1963	39.834297647241314
1964	39.969986661571944
1965	40.0827094414461
1966	40.18505588255541
1967	40.28449036837502
1968	40.38500920601032
1969	40.479814098986346
1970	40.575967711219754
1971	40.684260801049
1972	40.803685321008274
1973	40.91519979429065
1974	41.00081578548088
1975	41.082303052296574
1976	41.173888824220704
1977	41.255182518991404
1978	41.31749237102473
1979	41.38962884544452
1980	41.459845437009356
1981	41.52485847778925
1982	41.60576012143339
1983	41.68964846909874
1984	41.770471913489885
1985	41.84322655173847
1986	41.90065554593836
1987	41.94742325627457
1988	41.978267074029986
1989	41.98774233127082
1990	42.0086253385142
1991	41.974626234137624
1992	41.94645515105742
1993	41.94180409637715
1994	41.865940999615674
1995	41.755500126573104
1996	41.71294690993986
1997	41.673948724987085
1998	41.58897309876269
1999	41.48385351663289
2000	41.37724513910472
2001	41.268956355378755
2002	41.18750724188036
2003	41.12800073414206
2004	41.060689993609905
2005	40.9889949130292
2006	40.91174435629445
2007	40.85255293996482
2008	40.82152166654044
2009	40.7909589085592
2010	40.75716662675926
2011	40.72866033449601
2012	40.710664383065094
2013	40.70149071468493
2014	40.680720078665466
2015	40.629974650964336
2016	40.547934930152245
2017	40.44204823170539
2018	40.32117349104514
2019	40.17348385036557
2020	40.00057466386073
2021	39.82329004622807
2022	39.759924595455
2023	39.51941779226993