Year	% of cohort
1970	46.4656105041504
1971	46.1360282897949
1972	46.6274108886719
1973	45.8511009216309
1974	45.6331405639648
1975	48.4619598388672
1976	54.6855583190918
1977	53.5985488891602
1978	53.554500579834
1979	52.9487380981445
1980	51.648609161377
1981	55.1091918945312
1982	58.9745788574219
1983	60.0241088867188
1984	55.3689804077148
1985	57.7183990478516
1986	60.0741310119629
1987	60.4158897399902
1988	62.2400894165039
1989	63.1808204650879
1990	65.6445236206055
1991	68.5441207885742
1992	67.4520111083984
1993	69.9910278320312
1994	71.0383987426758
1995	73.3463363647461
1996	73.7164535522461
1997	74.8244094848633
1998	76.0578231811523
1999	77.1544189453125
2000	76.6678085327148
2001	79.7058868408203
2002	79.5168914794922
2003	79.8699111938477
2004	80.3118896484375
2005	80.8510437011719
2006	81.7118530273438
2007	82.0644989013672
2008	83.6413726806641
2009	83.7368621826172
2010	83.736686706543
2011	83.14013671875
2012	82.5896377563477
2013	84.5495300292969
2014	85.4809417724609
2015	85.16015625
2016	86.6792678833008
2017	86.527717590332
2018	86.98095703125
2019	86.8350982666016
2020	87.6426010131836
2021	87.8279113769531