Year	% of cohort
1970	48.3088684082031
1971	34.0288696289062
1972	38.768310546875
1973	34.3955192565918
1981	35.6705589294434
1982	52.0649185180664
1983	53.4627113342285
1984	47.907299041748
1985	55.3975601196289
1986	63.8007316589355
1987	53.2497482299805
1988	53.1883583068848
1992	58.772819519043
1993	63.2442588806152
1994	54.6551208496094
1998	56.1865196228027
1999	64.0378799438477
2004	78.3190307617188
2005	77.2792892456055
2006	81.5568923950195
2009	83.9922027587891
2010	87.6164169311523
2011	82.6119079589844
2012	72.6420364379883
2013	81.1839981079102
2014	85.8361434936523
2015	87.8815307617188
2016	89.587516784668
2017	90.1851119995117
2018	92.8371734619141
2019	93.7526626586914
2020	96.9423370361328
2021	89.8387832641602