Year	% of cohort
1971	67.8108978271484
1972	67.4106292724609
1973	66.5997924804688
1974	66.5790100097656
1975	67.6250991821289
1976	68.5501708984375
1977	69.9718017578125
1978	69.54248046875
1979	69.6660232543945
1980	69.2589111328125
1981	69.5688781738281
1982	70.0780334472656
1983	70.3934783935547
1984	70.2843933105469
1985	70.9264907836914
1986	71.8967132568359
1987	73.2954483032227
1988	73.3228988647461
1989	73.3947830200195
1990	74.6365280151367
1991	74.8392333984375
1992	75.0851516723633
1993	75.6796569824219
1994	75.9730606079102
1995	76.8901977539062
1996	76.9307327270508
1997	77.170051574707
1998	77.2032165527344
1999	77.1877517700195
2000	77.101806640625
2001	78.6353912353516
2002	77.8252716064453
2003	77.3123016357422
2004	77.4151000976562
2005	77.8627471923828
2006	77.4679565429688
2007	77.2858505249023
2008	78.7547302246094
2009	78.712043762207
2010	78.4735412597656
2011	79.4576187133789
2012	78.7946090698242
2013	79.700813293457
2014	82.4826889038086
2015	82.6070709228516
2016	81.8259887695312
2017	82.2112579345703
2018	82.6327209472656
2019	84.8511276245117
2020	84.8662185668945
2021	85.3912963867188