Year	% of relevant age group
1971	61.475830078125
1972	62.3397789001465
1973	62.4611015319824
1974	63.7274398803711
1975	63.4737701416016
1976	62.9192390441895
1977	61.351188659668
1978	61.8663902282715
1979	62.4163398742676
1980	62.5931282043457
1981	65.0586013793945
1982	65.532356262207
1983	64.6949234008789
1984	63.5788307189941
1985	66.2482376098633
1986	68.0323791503906
1987	65.0576324462891
1988	64.3226318359375
1989	61.7120513916016
1990	64.3264312744141
1991	63.9586715698242
1992	63.7806282043457
1993	63.6116981506348
1994	64.7230224609375
1995	65.5254898071289
1996	66.9999923706055
1997	68.5969085693359
1998	71.3084030151367
1999	72.6840896606445
2000	72.5781936645508
2001	73.7189788818359
2002	73.8050994873047
2003	74.5044097900391
2004	73.381950378418
2005	72.888557434082
2006	74.905403137207
2007	75.9388809204102
2008	77.1446228027344
2009	77.514778137207
2010	77.8822402954102
2011	77.7822723388672
2012	78.7236022949219
2013	78.805419921875
2014	79.3345184326172
2015	80.0461196899414
2016	80.6535263061523
2017	80.5040969848633
2018	80.7249298095703
2019	80.8203887939453
2020	80.7615203857422