Year	% of cohort
1972	68.7303237915039
1973	70.2221221923828
1974	74.6113891601562
1976	79.8583374023438
1977	83.454460144043
1978	85.3563613891602
1979	82.1189727783203
1980	80.3429107666016
1981	79.5853271484375
1982	78.059211730957
1983	75.2008895874023
1984	66.2496032714844
1985	66.6637420654297
1986	66.9793472290039
1987	65.7544403076172
1988	63.0439414978027
1989	76.1572723388672
1990	73.4074096679688
1991	69.3179473876953
1992	73.8594665527344
1993	74.0921630859375
1994	73.5910797119141
1995	70.5104598999023
1996	67.5688018798828
1997	66.9455413818359
1998	70.5133590698242
1999	75.5568466186523
2000	74.5843505859375
2001	77.6742935180664
2002	74.9806900024414
2003	67.6847763061523
2004	69.947380065918
2005	71.5608825683594
2006	76.3375396728516
2007	75.6839599609375
2008	78.3425979614258
2009	90.4444122314453
2010	89.0199432373047
2011	87.789176940918
2012	91.3150329589844
2013	88.79345703125
2014	86.9486999511719
2015	93.1988372802734
2016	95.3965377807617
2017	93.6608734130859
2018	95.050422668457
2019	96.0190505981445
2020	92.4845199584961
2021	98.3568115234375