Year	% of cohort
1971	56.2848205566406
1972	48.3832511901855
1973	58.1549186706543
1974	77.503791809082
1975	78.6675796508789
1976	80.9294967651367
1977	82.0930023193359
1978	73.6701507568359
1979	74.8706436157227
1981	78.2485809326172
1982	78.8419876098633
1983	78.6521987915039
1984	78.2471618652344
1985	78.4110336303711
1988	76.2610778808594
1989	79.0655975341797
1990	77.9560012817383
1991	76.3720779418945
1992	78.4033737182617
1993	83.9159393310547
1994	86.1443176269531
1995	87.0962982177734
1996	85.2341079711914
1998	86.5128784179688
1999	87.1764984130859
2000	88.3398895263672
2001	92.0994186401367
2002	93.1586303710938
2003	93.2857437133789
2004	93.5087814331055
2006	94.2752838134766
2007	94.1309814453125
2008	94.6836624145508
2009	94.8485107421875
2012	94.1314468383789
2013	93.9713821411133
2014	93.2070388793945
2016	94.1708831787109
2020	97.3015518188477