Year	% of cohort
1970	75.578742980957
1971	75.5118637084961
1972	76.6116180419922
1973	77.0184936523438
1974	78.1142196655273
1975	79.4815902709961
1976	79.1752014160156
1977	79.4452514648438
1978	78.834587097168
1979	79.7123107910156
1980	80.3286437988281
1981	81.102783203125
1982	81.179069519043
1983	82.8534088134766
1984	83.7561416625977
1985	84.6171188354492
1986	84.5464630126953
1987	85.3269577026367
1988	83.8997421264648
1989	85.7655334472656
1990	86.3598022460938
1991	85.7075500488281
1992	85.7334213256836
1993	85.4722671508789
1994	85.4047622680664
1995	85.7428207397461
1996	85.6592788696289
1997	85.0068969726562
1998	85.173828125
1999	85.6284332275391
2000	85.7261276245117
2001	84.2967300415039
2002	83.1864471435547
2003	83.0541076660156
2004	81.488037109375
2005	81.3602600097656
2006	82.7697982788086
2007	83.605842590332
2008	84.1946029663086
2009	85.3217926025391
2010	86.1893310546875
2011	85.5156326293945
2012	81.6838989257812
2013	81.6482620239258
2014	82.0777893066406
2015	83.005500793457
2016	83.7311401367188
2017	84.0665893554688
2018	84.9290237426758
2019	85.4497985839844
2020	85.7134323120117
2021	87.5936431884766