Year	% of cohort
1960	83.601843
1961	84.385306
1962	84.647611
1963	84.657161
1964	84.632989
1965	85.108982
1966	85.70248
1967	85.898525
1968	85.642721
1969	85.487608
1970	86.039309
1971	86.212511
1972	86.527158
1973	86.904341
1974	86.943321
1975	86.911327
1976	86.93314
1977	87.366097
1978	87.892605
1979	87.581127
1980	87.65613
1981	88.231565
1982	88.323393
1983	88.714888
1984	88.808393
1985	88.790961
1986	89.074235
1987	88.987984
1988	88.929997
1989	89.540775
1990	89.373172
1991	89.312489
1992	89.653094
1993	89.939392
1994	90.023922
1995	90.312343
1996	90.454291
1997	90.856681
1998	90.803988
1999	90.946593
2000	90.790338
2001	91.161606
2002	91.321246
2003	91.425321
2004	91.526916
2005	91.55977
2006	91.762842
2007	92.112621
2008	92.109423
2009	92.213096
2010	92.543806
2011	92.736432
2012	92.781008
2013	92.817231
2014	92.969477
2015	93.128627
2016	93.171519
2017	93.311372
2018	93.446706
2019	93.636601
2020	93.802506
2021	93.958866
2022	94.066636