Year	% of cohort
1971	51.0665817260742
1972	53.7239418029785
1973	58.781120300293
1974	54.6327514648438
1975	59.6319694519043
1976	59.3016700744629
1977	60.9744110107422
1978	71.6849975585938
1979	62.9381217956543
1980	70.6427917480469
1981	67.2307205200195
1982	65.9933166503906
1983	70.0368423461914
1984	60.9133682250977
1987	67.0320587158203
1993	40.2949409484863
1994	76.6355972290039
1995	77.6642837524414
1996	85.2450637817383
1998	77.6038970947266
1999	77.0131378173828
2000	77.8499374389648
2001	78.0232315063477
2002	74.4096908569336
2003	76.2689437866211
2004	76.3288421630859
2005	77.2888870239258
2006	81.7008972167969
2008	94.762077331543
2009	91.7784423828125
2010	95.1434326171875
2011	87.2359085083008
2012	94.1747207641602
2014	84.6728515625
2015	92.5515289306641
2016	93.5159072875977
2017	99.1730728149414
2018	96.9876480102539
2019	96.9299774169922
2020	98.7390823364258
2021	99.6412963867188