Year	% of total population
1960	11.7243058197438
1961	11.7955645809442
1962	11.8541344394882
1963	11.9127378495318
1964	12.0166584666227
1965	12.1722762097366
1966	12.3294769172029
1967	12.5033629004341
1968	12.6788632448906
1969	12.8445206368421
1970	13.0267986354865
1971	13.2225021938348
1972	13.4182584965204
1973	13.6157520365362
1974	13.8226268141766
1975	14.0332034803623
1976	14.2277661388859
1977	14.4223096732074
1978	14.6249923187393
1979	14.7987626124578
1980	14.93299545463
1981	15.0078179959583
1982	14.9957007187211
1983	14.9279599314795
1984	14.9476466503893
1985	15.1145645075628
1986	15.3196968388352
1987	15.4860251205418
1988	15.5986136061663
1989	15.664004997959
1990	15.7156492890262
1991	15.7597387150838
1992	15.787686465688
1993	15.7914201340605
1994	15.7947743307623
1995	15.8054841499011
1996	15.8053071763377
1997	15.7966022346963
1998	15.7694280778532
1999	15.7327383665128
2000	15.7189212612901
2001	15.7350698612144
2002	15.7621181726638
2003	15.7889626752975
2004	15.8182764656366
2005	15.8372945472417
2006	15.8461055823905
2007	15.8912342070793
2008	15.9970359309075
2009	16.1572883797959
2010	16.3429416952955
2011	16.5976344160848
2012	16.952815090638
2013	17.3005623733784
2014	17.5812898743289
2015	17.7986610954152
2016	17.9739585909132
2017	18.143475320509
2018	18.3221361235212
2019	18.530703049907
2020	18.7225119004065
2021	18.9160989404749
2022	19.1698838148618
2023	19.4582577134362