Year	% of cohort
1970	66.1378479003906
1971	64.9202575683594
1972	64.5168380737305
1973	63.5855903625488
1974	63.4880294799805
1975	65.1064376831055
1976	66.2556533813477
1977	67.8545074462891
1978	67.5402908325195
1979	67.6295318603516
1980	67.3444976806641
1981	67.9280776977539
1982	68.1325225830078
1983	68.6610565185547
1984	68.3357162475586
1985	69.13671875
1986	70.4643402099609
1987	72.6151885986328
1988	72.7213897705078
1989	72.8418121337891
1990	74.4474182128906
1991	74.872428894043
1992	75.1045837402344
1993	75.9847793579102
1994	76.5379791259766
1995	77.6767425537109
1996	78.1383895874023
1997	78.2491226196289
1998	78.0027389526367
1999	78.1741180419922
2000	77.5310516357422
2001	79.0202484130859
2002	78.7951278686523
2003	78.8533630371094
2004	79.1872711181641
2005	79.754508972168
2006	80.8462982177734
2007	81.43212890625
2008	83.2326278686523
2009	84.3169174194336
2010	85.1249237060547
2011	85.6971282958984
2012	85.9764175415039
2013	86.7295532226562
2014	91.0063095092773
2015	90.5901565551758
2016	90.5208587646484
2017	90.5672607421875
2018	90.7731704711914
2019	94.5394515991211
2020	94.804817199707
2021	95.2043380737305