Year	% of cohort
1974	48.3608016967773
1975	55.1940689086914
1976	64.6327514648438
1977	59.3886489868164
1978	69.6591491699219
1979	63.9233894348145
1980	64.9316482543945
1981	65.6413726806641
1982	68.7658386230469
1983	70.314323425293
1984	67.8540420532227
1985	70.9441299438477
1986	71.5119781494141
1987	68.957878112793
1988	71.6753234863281
1989	69.7534713745117
1990	71.5590286254883
1991	75.5162506103516
1992	77.8693618774414
1993	81.0451126098633
1994	82.084602355957
1995	83.9257125854492
1996	83.2653121948242
1998	86.7459106445312
1999	87.224983215332
2000	87.1516494750977
2001	88.9899826049805
2002	91.1543197631836
2003	90.3838195800781
2004	91.6240921020508
2005	92.135383605957
2006	92.3488006591797
2007	91.5125274658203
2008	94.0103912353516
2009	94.1522827148438
2010	95.0052108764648
2011	95.7526702880859
2012	94.5729675292969
2013	95.712646484375
2014	95.7173690795898
2015	92.1947479248047
2016	98.6583709716797
2017	94.9380874633789
2018	96.9510726928711
2019	96.525032043457
2020	97.945182800293
2021	97.0655670166016