Year	% of cohort
1960	76.05391
1961	76.270326
1962	76.448559
1963	76.610231
1964	76.776747
1965	76.967868
1966	77.184796
1967	77.404446
1968	77.647468
1969	77.870052
1970	78.072638
1971	78.254577
1972	78.399421
1973	78.588239
1974	78.757889
1975	78.940779
1976	79.144788
1977	79.378798
1978	79.653197
1979	79.98044
1980	80.372972
1981	80.820794
1982	81.293497
1983	81.761825
1984	82.199341
1985	82.58263
1986	82.905998
1987	83.181166
1988	83.422038
1989	83.644044
1990	83.862766
1991	84.083227
1992	84.299229
1993	84.504529
1994	84.694014
1995	84.863148
1996	85.012744
1997	85.148426
1998	85.283493
1999	85.42497
2000	85.589001
2001	85.772753
2002	85.961583
2003	86.152783
2004	86.322326
2005	86.449055
2006	86.570639
2007	86.659186
2008	86.748863
2009	86.846098
2010	86.970243
2011	87.115429
2012	87.260487
2013	87.384396
2014	87.468076
2015	87.489249
2016	87.451752
2017	87.433623
2018	87.483287
2019	87.673209
2020	87.957571
2021	85.258751
2022	87.887997