Year	% of total population
1960	31.075852742505
1961	31.516833925875
1962	31.7664645296199
1963	31.7764283921791
1964	31.5507736644015
1965	31.2029845069099
1966	30.8052398197201
1967	30.3464838443217
1968	29.829191102391
1969	29.2440355250325
1970	28.6112880618957
1971	27.963113498647
1972	27.2945831171839
1973	26.5985052574698
1974	25.9001978890143
1975	25.2147517382334
1976	24.5539685728599
1977	23.9543456530488
1978	23.459020628235
1979	23.1139715229681
1980	22.9141907968794
1981	22.813971946581
1982	22.7898313606278
1983	22.8395933906158
1984	22.9231513836273
1985	22.9882166669578
1986	23.0556516727163
1987	23.112874806158
1988	23.1568261611771
1989	23.178661886613
1990	23.1333290182456
1991	23.0098321161423
1992	22.8090072387523
1993	22.5222719925087
1994	22.1390134758171
1995	21.6754004322053
1996	21.144796333699
1997	20.537301327137
1998	19.864728496333
1999	19.1852028121463
2000	18.5167673225202
2001	17.815457845019
2002	17.1119407126763
2003	16.454506005338
2004	15.8605209899785
2005	15.3809253054026
2006	15.028426940992
2007	14.7996699771402
2008	14.7071065627852
2009	14.7620227394601
2010	14.9249385521774
2011	15.1479736517475
2012	15.4280041705227
2013	15.7326645847987
2014	16.022717548785
2015	16.2867455022669
2016	16.5228607834069
2017	16.6971075856346
2018	16.7788682123858
2019	16.8126098372633
2020	16.8397311511557
2021	16.8403350640924
2022	16.7758482748921
2023	16.6341378264053