Year	% of cohort
1974	74.2402496337891
1975	74.2760696411133
1976	75.1631698608398
1977	75.8636093139648
1978	78.6859893798828
1979	78.0047225952148
1980	80.5907363891602
1981	79.5543212890625
1982	77.7955780029297
1983	76.5868835449219
1984	75.8068618774414
1985	75.3414306640625
1986	75.0577774047852
1987	74.4718399047852
1988	75.5801162719727
1989	77.1135864257812
1990	78.3405532836914
1991	78.4908599853516
1992	78.6669921875
1993	78.7780532836914
1994	79.0291595458984
1995	79.4057464599609
1996	79.6946411132812
1997	79.936897277832
1998	80.1781463623047
1999	80.5503234863281
2000	77.7273483276367
2001	78.9050521850586
2002	79.8558807373047
2003	80.9449691772461
2004	80.5108871459961
2005	81.2860870361328
2006	81.5204391479492
2007	84.1894302368164
2008	85.6812896728516
2009	84.2449722290039
2010	83.9011001586914
2011	85.8446273803711
2012	86.7108764648438
2013	88.6503067016602
2014	89.3681182861328
2015	89.2171401977539
2016	86.5893478393555
2017	89.7900695800781
2018	88.9905319213867
2019	84.0188522338867
2020	83.2965087890625
2021	82.9207382202148