Year	% of cohort
1974	60.0028686523438
1975	66.4824905395508
1977	73.8378524780273
1978	71.0826568603516
1982	96.166877746582
1983	94.5552520751953
1984	97.8333282470703
1985	96.3744888305664
1986	94.6691436767578
1987	95.7399291992188
1988	94.9785919189453
1989	96.0160903930664
1991	95.4419326782227
1993	96.3738479614258
1994	95.1591796875
1995	95.9707870483398
1996	95.9020080566406
1997	95.142448425293
1998	94.5745620727539
1999	93.6671371459961
2000	95.2156982421875
2001	96.0679931640625
2002	97.8740463256836
2011	93.6720199584961
2012	99.0986099243164
2014	97.5932998657227
2015	100
2016	98.2880935668945