Year	% of cohort
1970	91.0907287597656
1971	91.0024795532227
1972	91.3420181274414
1973	91.5184707641602
1974	91.5298690795898
1975	91.8244018554688
1976	92.0894622802734
1977	92.5623779296875
1978	92.5231781005859
1979	92.3477020263672
1980	92.6292724609375
1981	93.3273468017578
1982	92.6735229492188
1983	93.3878021240234
1984	94.1590118408203
1985	94.3844375610352
1986	93.2652206420898
1987	92.982048034668
1988	93.8625335693359
1989	94.4805679321289
1990	94.5919189453125
1991	94.6476364135742
1992	94.5165863037109
1993	94.7389373779297
1994	94.8167724609375
1995	95.0050430297852
1996	95.1250991821289
1997	95.1725311279297
1998	95.2810668945312
1999	95.3059310913086
2000	95.4476470947266
2001	95.647819519043
2002	95.7935028076172
2003	96.2970733642578
2004	96.4614181518555
2005	96.1262283325195
2006	96.0693969726562
2007	95.7265319824219
2008	95.7510375976562
2009	95.2940216064453
2010	95.9062194824219
2011	95.6948013305664
2012	95.3709716796875
2013	95.6156616210938
2014	95.8902816772461
2015	96.2841720581055
2016	96.5530395507812
2017	96.4921264648438
2018	96.582389831543
2019	96.5885925292969
2020	96.4869766235352
2021	96.5028686523438