Year	% of cohort
1970	71.7639236450195
1971	71.6461791992188
1972	73.1124725341797
1973	73.0504989624023
1974	73.9287185668945
1975	75.4430923461914
1976	74.961067199707
1977	75.229606628418
1978	74.115478515625
1979	75.4850692749023
1980	76.204460144043
1981	77.5088272094727
1982	77.8740081787109
1983	78.994499206543
1984	80.0005874633789
1985	81.4319000244141
1986	81.307746887207
1987	83.4916305541992
1988	81.5040817260742
1989	83.691650390625
1990	84.3108215332031
1991	84.2415466308594
1992	84.4712677001953
1993	84.2500915527344
1994	84.0083312988281
1995	84.5687866210938
1996	84.9437026977539
1997	84.6012115478516
1998	85.0206069946289
1999	85.5827713012695
2000	85.6379089355469
2001	84.1155014038086
2002	83.0948104858398
2003	82.4587631225586
2004	81.2554016113281
2005	81.1095962524414
2006	82.6280212402344
2007	83.4426574707031
2008	84.1056900024414
2009	85.2710037231445
2010	85.8831634521484
2011	85.3974227905273
2012	81.5111694335938
2013	81.4220962524414
2014	81.6646728515625
2015	83.1660537719727
2016	83.3453521728516
2017	83.7917709350586
2018	84.6688079833984
2019	84.9420394897461
2020	84.99951171875
2021	87.1525115966797