Year	% of cohort
1975	79.2455978393555
1983	85.7635269165039
1993	95.2700271606445
1994	95.0605163574219
1998	94.4975891113281
2003	97.682991027832
2004	98.2617111206055
2005	98.025146484375
2006	98.0348663330078
2007	97.618522644043
2008	98.341423034668
2009	98.0682907104492
2010	98.8421020507812
2011	98.6325988769531
2016	96.294319152832
2017	98.1116027832031
2018	97.3032608032227
2019	99.1722106933594