Year	% of cohort
1970	73.5610961914062
1971	73.4748382568359
1972	74.7362823486328
1973	74.7139892578125
1974	75.3284301757812
1975	76.7272262573242
1976	76.1753387451172
1977	76.5972366333008
1978	75.5098419189453
1979	76.9380416870117
1980	77.6994171142578
1981	78.9415512084961
1982	79.2633514404297
1983	80.2187576293945
1984	81.165397644043
1985	82.3991470336914
1986	82.2553482055664
1987	84.3207321166992
1988	82.5458602905273
1989	84.5284423828125
1990	85.0661010742188
1991	84.9065628051758
1992	85.2571029663086
1993	85.1366424560547
1994	84.9554214477539
1995	85.3810577392578
1996	85.7330322265625
1997	85.4870300292969
1998	85.8746719360352
1999	86.3604202270508
2000	86.4998779296875
2001	85.1603164672852
2002	84.2981262207031
2003	83.7718811035156
2004	82.7076721191406
2005	82.616813659668
2006	83.9693832397461
2007	84.6723709106445
2008	85.4809875488281
2009	86.7846984863281
2010	87.5422134399414
2011	87.5084533691406
2012	83.5835418701172
2013	82.8391418457031
2014	82.3161697387695
2015	82.9813385009766
2016	83.3728866577148
2017	84.228889465332
2018	85.32421875
2019	86.0575637817383
2020	85.9719085693359
2021	87.9606018066406