Year	% of cohort
1970	84.8010635375977
1971	83.5914306640625
1972	83.5549774169922
1973	82.9097366333008
1974	83.1401062011719
1975	83.9264297485352
1976	84.4632415771484
1977	83.9845123291016
1978	84.98046875
1979	84.593391418457
1980	84.5543670654297
1981	85.4185409545898
1982	86.8414535522461
1983	87.3556213378906
1984	87.038818359375
1985	88.6369018554688
1986	88.5259704589844
1987	87.7422485351562
1988	88.1025619506836
1989	87.8621368408203
1990	88.6299362182617
1991	90.1358795166016
1992	88.9577026367188
1993	89.8702621459961
1994	89.0310974121094
1995	90.2735366821289
1996	89.6196899414062
1997	89.6318511962891
1998	90.1125717163086
1999	90.7382431030273
2000	90.4605331420898
2001	91.3142318725586
2002	92.0078811645508
2003	92.2557067871094
2004	92.9338836669922
2005	92.8885726928711
2006	93.1362228393555
2007	92.7323532104492
2008	93.1087493896484
2009	93.7578125
2010	93.8654174804688
2011	93.3236389160156
2012	92.6209411621094
2013	93.6211929321289
2014	93.6073913574219
2015	93.5720520019531
2016	95.2818832397461
2017	94.7489395141602
2018	95.3050003051758
2019	95.3681869506836
2020	94.8957977294922
2021	94.8682479858398