Year	% of cohort
1970	75.8420104980469
1971	75.7764663696289
1972	76.8604736328125
1973	77.2765502929688
1974	78.3385696411133
1975	79.6852264404297
1976	79.3816070556641
1977	79.6494369506836
1978	79.0347595214844
1979	79.9134826660156
1980	80.5275802612305
1981	81.2906875610352
1982	81.361457824707
1983	83.0183181762695
1984	83.9153137207031
1985	84.7569274902344
1986	84.6883697509766
1987	85.4658508300781
1988	84.0554580688477
1989	85.90234375
1990	86.490837097168
1991	85.8482208251953
1992	85.8796081542969
1993	85.6281204223633
1994	85.5695190429688
1995	85.9127426147461
1996	85.8423690795898
1997	85.2031631469727
1998	85.3688278198242
1999	85.8295822143555
2000	85.9100189208984
2001	84.4947967529297
2002	83.3985366821289
2003	83.2629623413086
2004	81.712272644043
2005	81.5940017700195
2006	82.999641418457
2007	83.8124618530273
2008	84.3859100341797
2009	85.4895782470703
2010	86.3407592773438
2011	85.7222213745117
2012	81.9025802612305
2013	81.8863830566406
2014	82.3014297485352
2015	83.2372817993164
2016	83.9563674926758
2017	84.2695617675781
2018	85.0873336791992
2019	85.640739440918
2020	85.8962631225586
2021	87.7523727416992