Year	% of cohort
1970	64.3088912963867
1971	63.1315383911133
1972	62.8649711608887
1973	62.1544799804688
1974	62.0174598693848
1975	63.3637504577637
1976	64.3679504394531
1977	65.8453369140625
1978	65.5604019165039
1979	65.6875
1980	65.2905731201172
1981	65.7415237426758
1982	66.1322402954102
1983	66.5996704101562
1984	66.3839111328125
1985	67.1813278198242
1986	68.3386993408203
1987	70.1820678710938
1988	70.3241500854492
1989	70.4598617553711
1990	71.7936325073242
1991	72.0861129760742
1992	72.5247497558594
1993	73.1611404418945
1994	73.4259490966797
1995	74.3206329345703
1996	74.3407135009766
1997	74.4667510986328
1998	74.1789398193359
1999	74.2849731445312
2000	73.9362564086914
2001	75.2348785400391
2002	74.8836364746094
2003	74.3560485839844
2004	74.5716018676758
2005	74.8904571533203
2006	74.6414184570312
2007	74.6382827758789
2008	76.2691497802734
2009	76.0989990234375
2010	75.8153610229492
2011	76.824951171875
2012	76.189697265625
2013	77.0151596069336
2014	79.886100769043
2015	79.9302368164062
2016	79.599006652832
2017	80.1298370361328
2018	79.9859466552734
2019	82.4822998046875
2020	82.8384704589844
2021	83.4995422363281