Year	% of cohort
1970	34.5682716369629
1971	37.7970504760742
1972	52.5254211425781
1973	42.2560501098633
1975	42.1124610900879
1976	42.0988998413086
1980	17.4272899627686
1981	65.890251159668
1982	46.0938606262207
1983	47.8594512939453
1987	49.0086517333984
1988	44.0377502441406
1991	55.7430610656738
1992	57.6093292236328
1995	76.1526184082031
2000	64.4030227661133
2001	67.0995025634766
2002	73.0100173950195
2005	70.0606079101562
2006	71.8369522094727
2007	78.1230621337891
2008	78.8785705566406
2009	88.9851379394531
2010	85.6956176757812
2011	85.5460433959961
2012	85.3952178955078
2013	84.056770324707
2014	81.0261306762695
2015	81.2774276733398
2016	77.2962265014648
2017	85.2315826416016
2019	83.3947601318359
2020	85.3621826171875