Year	% of total population
1960	17.261937355384134
1961	17.61444063883362
1962	18.03708344274985
1963	18.47474930630951
1964	18.92517947220581
1965	19.383968925732464
1966	19.86014170526196
1967	20.352829030448436
1968	20.8630464145015
1969	21.38552153936142
1970	21.975294732757273
1971	22.594696882569025
1972	23.169253780863265
1973	23.40549452683634
1974	23.661330893743347
1975	23.932407589756355
1976	24.22128826567926
1977	24.506858807664628
1978	24.78799746130656
1979	25.07782757499845
1980	25.369603243830497
1981	25.668317538409923
1982	25.72758405021951
1983	25.779562504853427
1984	25.83919667508156
1985	25.908837010504588
1986	25.99265841291932
1987	26.088994628316662
1988	26.187985423054773
1989	26.288754356150353
1990	26.39880078333359
1991	26.534842172915337
1992	26.69549093236642
1993	26.863331201542984
1994	26.88783567270135
1995	26.922312539278103
1996	26.975557049450234
1997	27.036710578739076
1998	27.113109940241443
1999	27.217602277657154
2000	27.363355874794436
2001	27.5571018951054
2002	27.79945916704613
2003	28.079007532072243
2004	28.38384692630589
2005	28.710620466278307
2006	29.06433293337202
2007	29.439321922462096
2008	29.806019089303216
2009	30.16671948876027
2010	30.51621487991682
2011	30.84228933437561
2012	31.150023618813695
2013	31.44362680957158
2014	31.71666515505675
2015	31.95096630901225
2016	32.12706774425759
2017	32.25540338155218
2018	32.26501387531912
2019	32.1546281643051
2020	32.18515697878105
2021	32.27822918445956
2022	32.436830072657564
2023	32.61570648890994