Year	% of total population
1960	36.3147660816548
1961	35.5352166361879
1962	34.619110930923
1963	33.6300744381094
1964	32.5755025670418
1965	31.5179794179552
1966	30.5147166960541
1967	29.5908343393675
1968	28.7140137491727
1969	27.8823471788382
1970	27.1298991167164
1971	26.4631115934992
1972	25.8055156996885
1973	25.1880971432005
1974	24.6718449414217
1975	24.2191484235918
1976	23.9096240650538
1977	23.7183041324758
1978	23.5947799240533
1979	23.5533170031304
1980	23.5875498745455
1981	23.6436365364791
1982	23.7533065326929
1983	23.9175702711688
1984	24.0155626058263
1985	24.0264380903278
1986	23.9410778164199
1987	23.8073987313082
1988	23.6672069724556
1989	23.4930345722303
1990	23.240688412292
1991	22.9502304909953
1992	22.6831540862027
1993	22.3905138424188
1994	22.019320430153
1995	21.6073914130866
1996	21.254370323073
1997	20.8983935489927
1998	20.4818049212385
1999	20.0551792061518
2000	19.6140391747232
2001	19.119162803073
2002	18.5565303553139
2003	17.9699153885663
2004	17.3773876371856
2005	16.8123244792886
2006	16.3116264082345
2007	15.842273727738
2008	15.4285845600463
2009	15.1066185318893
2010	14.8161812993278
2011	14.5243654546699
2012	14.2535478603512
2013	14.012342151877
2014	13.8147033986574
2015	13.6617252016904
2016	13.5656022492811
2017	13.5032127416856
2018	13.4093525853055
2019	13.2949589434401
2020	13.1987860865651
2021	13.1344589822837
2022	13.1489482191545
2023	13.2026138904749