Year	% of total population
1960	3.38081773967172
1961	3.36366987905946
1962	3.35077716227212
1963	3.34728579611761
1964	3.35326155639569
1965	3.3681423140872
1966	3.39090331060425
1967	3.41995025446731
1968	3.45366191428671
1969	3.49048568424349
1970	3.52863771783528
1971	3.56728222085626
1972	3.6045983825057
1973	3.64006778136446
1974	3.67484711897141
1975	3.70870244623077
1976	3.74327526016086
1977	3.77657954758002
1978	3.80689997242645
1979	3.83519873940889
1980	3.85940946896791
1981	3.88199326080921
1982	3.90112408228662
1983	3.91322175656585
1984	3.92390105329689
1985	3.94325073199497
1986	3.94378280405519
1987	3.91811083554616
1988	3.89376831534317
1989	3.87339532940919
1990	3.86192664196941
1991	3.86862849962315
1992	3.90267968095883
1993	3.95293024654266
1994	3.9996145879835
1995	4.04145206470301
1996	4.08607138344238
1997	4.11777962432788
1998	4.12974815486636
1999	4.13817897142246
2000	4.15696166292864
2001	4.19047424254993
2002	4.23573195518158
2003	4.29228113721031
2004	4.36278812591735
2005	4.44610735457423
2006	4.53021812360022
2007	4.61450543901984
2008	4.70263683296532
2009	4.79463972983487
2010	4.89346691391624
2011	4.99493019373838
2012	5.10559001816783
2013	5.23252049760313
2014	5.34771425404166
2015	5.43221082693362
2016	5.57024523302841
2017	5.73733422835895
2018	5.8541242894204
2019	5.95003826584081
2020	6.00053469336587
2021	5.97213054126334
2022	5.89299052905826
2023	5.85165452307145