Year	% of cohort
1970	92.0986785888672
1971	92.1382293701172
1972	92.310188293457
1973	92.5377731323242
1974	92.892578125
1975	92.9666290283203
1976	92.9035873413086
1977	93.2626419067383
1978	93.3481674194336
1979	93.296142578125
1980	92.9086074829102
1981	92.9230270385742
1982	92.7666778564453
1983	92.8175811767578
1984	93.0376281738281
1985	93.1135406494141
1986	92.8060836791992
1987	92.8095779418945
1988	93.0544128417969
1989	93.0295028686523
1990	93.5562133789062
1991	93.9001770019531
1992	93.9751663208008
1993	94.0271301269531
1994	93.9745407104492
1995	93.7283401489258
1996	93.5057067871094
1997	93.6643981933594
1998	93.8475036621094
1999	94.0345764160156
2000	94.0721435546875
2001	94.1879196166992
2002	94.2413711547852
2003	94.2605972290039
2004	94.3445892333984
2005	94.2136611938477
2006	94.2228012084961
2007	93.9842376708984
2008	94.2523727416992
2009	94.1406936645508
2010	94.1789932250977
2011	94.119743347168
2012	94.1648864746094
2013	94.2772521972656
2014	93.2882614135742
2015	94.1878662109375
2016	94.4679489135742
2017	94.3118667602539
2018	94.6710968017578
2019	94.6772384643555
2020	93.5261993408203
2021	93.4318695068359