Year	% of cohort
1960	75.56972
1961	75.257191
1962	74.225659
1963	74.543634
1964	74.38301
1965	74.156539
1966	74.053368
1967	74.169719
1968	74.036842
1969	73.784642
1970	73.366187
1971	73.96634
1972	73.700066
1973	74.735731
1974	75.182599
1975	74.981601
1976	75.158822
1977	76.057266
1978	76.103725
1979	76.919557
1980	76.992066
1981	77.606212
1982	77.453445
1983	78.311011
1984	78.3951
1985	78.507663
1986	78.561706
1987	79.288652
1988	79.819712
1989	79.717499
1990	80.43444
1991	80.637941
1992	81.135026
1993	80.794309
1994	81.596186
1995	81.958404
1996	82.078229
1997	82.91445
1998	82.973578
1999	83.239287
2000	83.516977
2001	84.01046
2002	84.312473
2003	84.60638
2004	85.301136
2005	86.037136
2006	86.434613
2007	86.939053
2008	87.092037
2009	87.354609
2010	87.645954
2011	88.141674
2012	88.088797
2013	88.367603
2014	88.711144
2015	88.821105
2016	88.895771
2017	89.067583
2018	89.196789
2019	89.6036
2020	89.796875
2021	89.763312
2022	90.091467