Year	% of cohort
1977	95.3482208251953
1984	97.4848480224609
1985	90.7712097167969
1986	95.5320205688477
1987	96.7758026123047
1988	97.1058578491211
1989	97.45166015625
1990	95.8177871704102
1991	96.3782424926758
1992	97.1628570556641
1993	95.8402862548828
1994	97.1274566650391
1995	99.0856018066406
1996	95.3495788574219
1997	91.8058319091797
1998	89.8393402099609
2000	89.7321395874023
2001	94.5267181396484
2002	90.4562301635742
2003	92.8275909423828
2004	96.1938323974609
2005	94.6219482421875
2006	96.1066131591797
2007	96.1866302490234
2008	96.9397277832031
2009	96.1282272338867
2010	95.7269897460938
2011	99.5730895996094
2012	99.8418273925781
2013	99.7428894042969
2014	99.4098815917969
2015	99.9015731811523
2019	99.1211471557617
2020	99.2590789794922