Year	% of cohort
1974	24.7519702911377
1975	57.7583618164062
1977	60.9211006164551
1978	51.2527389526367
1982	79.6579818725586
1983	82.9479827880859
1984	91.8938598632812
1985	86.7150421142578
1986	85.8487777709961
1987	88.6345901489258
1988	88.8593521118164
1989	88.4177398681641
1991	90.4089736938477
1993	92.9474716186523
1994	93.4540100097656
1995	93.8776931762695
1996	93.470947265625
1997	92.4700317382812
1998	92.2874603271484
1999	92.1072769165039
2000	95.3265991210938
2001	95.5337600708008
2002	97.3520965576172
2011	95.1103515625
2012	98.2415466308594
2014	98.5734100341797
2015	98.3361587524414
2016	98.4711685180664
2018	98.8489379882812
2019	99.3010101318359
2020	96.3884429931641
2021	98.7861862182617