Year	% of cohort
1970	64.7409973144531
1971	63.5252494812012
1972	63.2334899902344
1973	62.4739799499512
1974	62.2981185913086
1975	63.6933517456055
1976	64.7288284301758
1977	66.227897644043
1978	65.9702606201172
1979	66.1979904174805
1980	65.8082580566406
1981	66.3087310791016
1982	66.686897277832
1983	67.0858306884766
1984	66.8309707641602
1985	67.648681640625
1986	68.8430786132812
1987	70.8997421264648
1988	71.2343826293945
1989	71.3055572509766
1990	72.677131652832
1991	73.0866928100586
1992	73.4447708129883
1993	74.2372436523438
1994	74.7485122680664
1995	75.6544189453125
1996	76.1165237426758
1997	76.251953125
1998	76.0746917724609
1999	76.1318817138672
2000	75.655632019043
2001	77.2611312866211
2002	76.9239120483398
2003	76.7690582275391
2004	76.9387893676758
2005	77.4059677124023
2006	77.1167297363281
2007	77.5341186523438
2008	79.8133697509766
2009	80.3632965087891
2010	80.3424835205078
2011	81.1841812133789
2012	81.2541427612305
2013	82.7348403930664
2014	86.1782684326172
2015	85.9816284179688
2016	85.6545715332031
2017	85.5180435180664
2018	85.5309982299805
2019	88.3263702392578
2020	88.3151779174805
2021	88.8774185180664