Year	% of cohort
1987	77.2692413330078
1988	78.1046371459961
1989	78.6378631591797
1990	82.4946136474609
1991	83.7708587646484
1992	84.5860595703125
1993	85.4470825195312
1994	87.1451721191406
1995	88.7666778564453
1996	89.6136779785156
1997	89.5690002441406
1998	89.4583892822266
1999	89.9012985229492
2000	90.5048675537109
2001	91.5336837768555
2002	91.6584320068359
2003	91.2043533325195
2004	91.4360275268555
2005	91.8523712158203
2006	92.3224563598633
2007	92.5452880859375
2008	92.8351821899414
2009	93.3954086303711
2010	93.6915664672852
2011	94.020881652832
2012	93.6472091674805
2013	93.7483825683594
2014	94.507926940918
2015	94.757698059082
2016	94.9653015136719
2017	95.2382278442383
2018	95.5291519165039
2019	95.7234573364258
2020	95.6324234008789
2021	95.8147125244141