Year	% of cohort
1971	71.1408767700195
1972	72.4244537353516
1973	72.2462005615234
1974	72.5497894287109
1975	73.9933395385742
1976	73.6619415283203
1977	74.2461013793945
1978	73.2749328613281
1979	74.8554000854492
1980	75.6986999511719
1981	77.2416610717773
1982	77.6800994873047
1983	78.8640518188477
1984	79.4559631347656
1985	81.3301696777344
1986	81.5679092407227
1987	82.2323226928711
1988	79.1011962890625
1989	80.7544479370117
1990	81.5287628173828
1991	81.5614166259766
1992	81.9240188598633
1993	82.4846725463867
1994	81.9821014404297
1995	82.0681915283203
1996	82.151008605957
1997	81.5467834472656
1998	81.8952331542969
1999	82.2849273681641
2000	82.1926116943359
2001	81.3506698608398
2002	81.6757507324219
2003	80.8056335449219
2004	79.4176483154297
2005	79.0103073120117
2006	80.4405212402344
2007	81.078742980957
2008	81.9603500366211
2009	83.6785278320312
2010	84.0232696533203
2011	84.4366302490234
2012	80.1254806518555
2013	79.3698425292969
2014	78.3181686401367
2015	80.00927734375
2016	80.1829071044922
2017	81.7250595092773
2018	82.8351974487305
2019	83.7634201049805
2020	83.6542816162109
2021	85.7267227172852