Year	% of total population
1960	3.53358039880568
1961	3.51923619987515
1962	3.49818151396322
1963	3.47180825916257
1964	3.44078262737402
1965	3.40611917661285
1966	3.36830692272556
1967	3.32699532329008
1968	3.28326923250202
1969	3.23788851129106
1970	3.18982815964977
1971	3.13934245038581
1972	3.08605728259
1973	3.03105261661827
1974	2.97705400229879
1975	2.92395313505356
1976	2.87534575162425
1977	2.83245325831066
1978	2.79382999781555
1979	2.760462286646
1980	2.73136460185335
1981	2.70650673600662
1982	2.68541092665144
1983	2.66664793691821
1984	2.65043405307123
1985	2.63674197038148
1986	2.62521583566575
1987	2.61491683557138
1988	2.60432528426709
1989	2.59339624801341
1990	2.58225949932091
1991	2.57263051925432
1992	2.56628395832166
1993	2.56666300861171
1994	2.5736942547112
1995	2.584650834087
1996	2.59854578600993
1997	2.61284306139863
1998	2.62575601121109
1999	2.63418351367895
2000	2.63329114647508
2001	2.62182309329567
2002	2.60195023607179
2003	2.57593161546246
2004	2.56738834158404
2005	2.52340758804416
2006	2.42953618778208
2007	2.34151859002787
2008	2.26098705658669
2009	2.1909210733197
2010	2.15425516633064
2011	2.15587604302286
2012	2.17380255469685
2013	2.20616550513504
2014	2.26222954404785
2015	2.32113291029626
2016	2.32801869161368
2017	2.30333314260296
2018	2.29264507048391
2019	2.29107574261259
2020	2.39663290714769
2021	2.60000195825381
2022	2.81012265709243
2023	3.05114823182651