Year	% of total population
1960	26.2392280261041
1961	26.2584522516185
1962	26.0358245787317
1963	25.8017368025271
1964	25.5786142597454
1965	25.3576975396534
1966	25.1644582970309
1967	24.9841411116096
1968	24.8193392916794
1969	24.6807493090679
1970	24.5493795259369
1971	24.4435555459378
1972	24.3560994147824
1973	24.2465285735584
1974	24.0783842710711
1975	23.8386527138307
1976	23.5436898386704
1977	23.2438786245753
1978	22.9420622642738
1979	22.6298928415577
1980	22.3715577533756
1981	22.1641726346767
1982	21.9763425925125
1983	21.7728375603489
1984	21.5389261121683
1985	21.29332116767
1986	21.0200308592999
1987	20.7144171230411
1988	20.4267000379895
1989	20.2024076984867
1990	20.0577502694109
1991	19.9745554856261
1992	19.8794482587662
1993	19.7406807651135
1994	19.5728147397073
1995	19.3770348402937
1996	19.1709896666928
1997	18.9774572813202
1998	18.8478591066208
1999	18.7750547502847
2000	18.7152735358576
2001	18.6538658604504
2002	18.5802717763657
2003	18.5040970931324
2004	18.4243391917787
2005	18.3477861733763
2006	18.2884889234338
2007	18.2462921051593
2008	18.2416249870445
2009	18.2746105151191
2010	18.3030070494363
2011	18.3117703431249
2012	18.3159073066943
2013	18.3056628243576
2014	18.2645944531063
2015	18.1869331011056
2016	18.0745056692548
2017	17.956176677331
2018	17.8354138790437
2019	17.701688275741
2020	17.5521513606696
2021	17.3733753734071
2022	17.1990019346205
2023	17.0411946065592