Year	% of cohort
1970	58.8886795043945
1971	72.1188888549805
1972	78.4685211181641
1973	88.3364562988281
1974	89.8299179077148
1975	81.2194671630859
1980	81.7151565551758
1981	75.533576965332
1982	89.1066284179688
1983	77.5042037963867
1984	63.5065383911133
1985	80.8286514282227
1986	71.1756286621094
1987	67.6430587768555
1988	72.6318283081055
1990	71.9194488525391
1991	74.71484375
1992	76.7982177734375
1993	69.4024276733398
1996	71.3975982666016
1997	65.3548583984375
1998	73.3070068359375
1999	69.675163269043
2000	73.9171676635742
2001	92.2211074829102
2003	80.0316314697266
2004	81.2449569702148
2005	79.1907119750977
2006	82.4829635620117
2008	73.910530090332
2009	81.3929214477539
2012	64.2875289916992
2017	91.9301223754883
2018	84.9326934814453
2019	78.5686569213867