Year	% of cohort
1986	24.2870502471924
1987	23.1710300445557
1988	34.1828308105469
1989	41.8288993835449
1990	32.9399185180664
1991	34.5153503417969
1992	35.2676010131836
1993	43.0100212097168
1994	46.5341796875
1998	46.7697715759277
1999	43.0846481323242
2000	52.4561004638672
2001	49.6235008239746
2004	62.4389190673828
2005	57.3964309692383
2006	64.2395782470703
2007	60.4367485046387
2008	54.7606315612793
2009	53.67333984375
2010	43.9809112548828
2011	48.6310615539551
2012	50.0719108581543
2013	48.4521484375
2014	49.7297286987305
2017	55.4645881652832
2018	57.9300689697266
2019	56.429069519043