Year	% of total population
1960	12.20958019209719
1961	12.38287484108307
1962	12.537089040404336
1963	12.684808604189476
1964	12.870633895485872
1965	13.833178830073079
1966	15.020309443848282
1967	16.3271444940846
1968	17.738498499224743
1969	19.248849729684466
1970	20.8701969487376
1971	22.60927733976061
1972	24.447236580358865
1973	26.230846882532667
1974	25.924661588311892
1975	25.313317983228327
1976	24.679131313800877
1977	24.062506761927054
1978	23.466724362200907
1979	22.89066380017587
1980	22.347673759248256
1981	21.844399850257794
1982	21.375323576454996
1983	20.933861277862547
1984	20.645119842717744
1985	20.50802958380572
1986	20.41546165768886
1987	20.362817518371322
1988	20.338798452841118
1989	20.334103139871218
1990	20.35153315460553
1991	20.391154155566678
1992	20.45338168924726
1993	20.53747329465321
1994	20.64968491559254
1995	20.791462103927202
1996	20.61473847038609
1997	20.409881309887144
1998	20.227799368876937
1999	20.058608168686504
2000	19.81939128461101
2001	19.499211132246987
2002	19.165079035011022
2003	18.8205947309234
2004	18.46910530925108
2005	18.118508677478843
2006	17.831327681246545
2007	17.591042543131024
2008	17.340588308016383
2009	17.09958081447554
2010	16.869239437904074
2011	17.82096761995381
2012	18.918187285238
2013	18.682952559312348
2014	18.465998356118735
2015	18.31104601165815
2016	18.174679682072956
2017	18.02575968590812
2018	17.87253776093185
2019	17.672437939634847
2020	17.509695756290032
2021	17.368105276145286
2022	17.26029275398868
2023	17.178068366648336