Year	% of cohort
1974	53.5701103210449
1975	56.8461799621582
1977	58.9699592590332
1978	60.1377983093262
1982	85.1730880737305
1983	86.9579086303711
1984	92.5855178833008
1985	89.1522369384766
1986	88.6343688964844
1987	90.3332901000977
1988	91.0104293823242
1989	90.8524932861328
1991	92.0523223876953
1993	93.0679092407227
1994	93.1068420410156
1995	93.6958312988281
1996	93.8547592163086
1997	92.6090316772461
1998	92.2033233642578
1999	91.9089965820312
2000	94.5015411376953
2001	95.17333984375
2002	97.3022537231445
2011	93.5630493164062
2012	98.6751708984375
2014	98.0651702880859
2015	99.1000671386719
2016	98.1405029296875
2018	98.8269424438477
2019	99.2066268920898
2020	96.5129928588867
2021	98.6551284790039