Year	% of total population
1960	40.7997405270107
1961	40.8082290374197
1962	40.8177445928791
1963	40.8664078129045
1964	40.9649875920453
1965	41.0679792944277
1966	41.1562380695827
1967	41.2406232578941
1968	41.318555712087
1969	41.3853085688275
1970	41.4387467105568
1971	41.4792075621973
1972	41.5036784983283
1973	41.4997832117242
1974	41.4753683110397
1975	41.4450241196183
1976	41.4115042353632
1977	41.3779519705469
1978	41.3429952703476
1979	41.3072198318118
1980	41.272035813255
1981	41.2373770689207
1982	41.1974477215645
1983	41.1460440282194
1984	41.0868393926256
1985	41.0264139951735
1986	40.9630475884405
1987	40.8976911651223
1988	40.8269709667975
1989	40.7438604984013
1990	40.6518649752152
1991	40.5443781003745
1992	40.412498940079
1993	40.2193137414153
1994	39.9770527205784
1995	39.7341366349415
1996	39.4923778066523
1997	39.2442224657961
1998	38.9883742202177
1999	38.729353798901
2000	38.4507188464195
2001	38.15850613829
2002	37.8462568126155
2003	37.4979215839286
2004	37.124586831627
2005	36.7322169030438
2006	36.3409478224762
2007	35.9581746841157
2008	35.5774800156225
2009	35.2058971373653
2010	34.8456919775029
2011	34.4884554717374
2012	34.1377761349261
2013	33.7908737768828
2014	33.4329914731514
2015	33.0737891966658
2016	32.7262090689656
2017	32.3860928744601
2018	32.0466782488527
2019	31.7083406408142
2020	31.4020327472097
2021	31.1219852986952
2022	30.8275449091999
2023	30.4869907917548