Year	% of cohort
1970	74.6386032104492
1971	74.5322113037109
1972	75.5487594604492
1973	75.8222579956055
1974	76.5484771728516
1975	77.7740173339844
1976	77.6639633178711
1977	78.2370529174805
1978	77.7565612792969
1979	78.8564987182617
1980	79.5461196899414
1981	80.5532073974609
1982	80.6970672607422
1983	82.4805908203125
1984	82.9097518920898
1985	84.1550064086914
1986	84.4586334228516
1987	84.167350769043
1988	81.9893188476562
1989	83.3990097045898
1990	84.0662078857422
1991	83.5068283081055
1992	83.5504989624023
1993	83.9878997802734
1994	83.5049667358398
1995	83.3625183105469
1996	83.0046920776367
1997	82.1389465332031
1998	82.2753219604492
1999	82.6001586914062
2000	82.5468521118164
2001	81.9593734741211
2002	82.1020202636719
2003	81.7389602661133
2004	80.0384368896484
2005	79.7050933837891
2006	80.9818115234375
2007	81.6923522949219
2008	82.2707595825195
2009	83.8483276367188
2010	84.0032806396484
2011	84.0145568847656
2012	79.5421829223633
2013	78.162971496582
2014	78.0665130615234
2015	79.9483337402344
2016	79.9021224975586
2017	81.6647033691406
2018	82.7742767333984
2019	83.7521820068359
2020	83.8566131591797
2021	85.6253204345703