Year	% of cohort
1970	92.4588088989258
1971	92.2759323120117
1972	92.2200393676758
1973	92.3507766723633
1974	92.6774520874023
1975	92.7558288574219
1976	92.7967071533203
1977	93.2412414550781
1978	93.4389801025391
1979	93.555549621582
1980	93.643928527832
1981	93.8190307617188
1982	93.8813781738281
1983	93.9884185791016
1984	94.3191986083984
1985	94.3559494018555
1986	94.0821914672852
1987	93.8785705566406
1988	94.0047607421875
1989	94.0775604248047
1990	94.1237411499023
1991	94.1301422119141
1992	94.2055206298828
1993	94.371337890625
1994	93.9941101074219
1995	94.1436996459961
1996	93.7454833984375
1997	93.7836837768555
1998	94.4030838012695
1999	94.3578033447266
2000	94.3674468994141
2001	94.439323425293
2002	94.5258407592773
2003	94.6038513183594
2004	94.6553497314453
2005	94.6122283935547
2006	94.5568618774414
2007	94.4409408569336
2008	94.5465393066406
2009	94.6126708984375
2010	94.6440734863281
2011	94.7268218994141
2012	94.2872009277344
2013	93.7948608398438
2014	93.5494079589844
2015	93.7918167114258
2016	93.7100219726562
2017	94.1160202026367
2018	94.5193099975586
2019	94.8645706176758
2020	93.7315063476562
2021	93.6820220947266