Year	% of cohort
1971	49.8765487670898
1972	46.7744407653809
1973	52.4177284240723
1974	60.1042594909668
1975	58.2225608825684
1976	61.4812507629395
1977	59.1554107666016
1978	62.3357582092285
1979	64.3519973754883
1980	66.4860687255859
1981	73.7868804931641
1982	69.5897979736328
1983	70.237663269043
1984	72.2495269775391
1986	73.5529708862305
1987	67.2271728515625
1988	67.4159088134766
1989	63.7444686889648
1990	70.7784118652344
1994	76.4835968017578
1998	58.8970985412598
1999	61.0433883666992
2000	61.3358192443848
2001	58.3311614990234
2002	66.5564880371094
2003	69.2229385375977
2004	68.9336471557617
2005	64.4365997314453
2006	72.0185623168945
2007	69.0033111572266
2008	71.1380386352539
2009	63.6259613037109
2011	68.9655075073242
2012	69.0744934082031
2013	69.4970169067383
2014	66.2402420043945
2015	68.8113327026367
2016	65.6362915039062
2017	68.8430328369141
2018	55.9191093444824
2019	54.4487800598145
2020	62.0630111694336
2021	46.0297889709473