Year	% of cohort
1970	79.1240081787109
1971	79.0737380981445
1972	79.9602432250977
1973	80.6873092651367
1974	81.9190292358398
1975	83.0780410766602
1976	82.9054794311523
1977	83.2914123535156
1978	83.4534378051758
1979	83.9266128540039
1980	84.4786605834961
1981	84.8891296386719
1982	84.7837905883789
1983	86.7424468994141
1984	87.5585708618164
1985	87.8920593261719
1986	87.8812484741211
1987	87.5848922729492
1988	86.8022232055664
1989	88.2775421142578
1990	88.8193435668945
1991	87.675407409668
1992	87.6244277954102
1993	87.4569778442383
1994	87.539192199707
1995	87.6184616088867
1996	87.2454833984375
1997	86.4821090698242
1998	86.4868011474609
1999	86.8133392333984
2000	86.9844436645508
2001	85.8448333740234
2002	84.8156127929688
2003	85.1353530883789
2004	83.4756393432617
2005	83.4294815063477
2006	84.6218338012695
2007	85.3894424438477
2008	85.7362289428711
2009	86.5705032348633
2010	87.3762588500977
2011	86.6057205200195
2012	82.4735488891602
2013	81.6662063598633
2014	81.5950698852539
2015	83.2108764648438
2016	83.9003601074219
2017	84.4790191650391
2018	85.455680847168
2019	86.5579376220703
2020	86.8830490112305
2021	88.3283309936523