Year	% of cohort
1960	80.956317
1961	81.354876
1962	80.764644
1963	81.453052
1964	81.477946
1965	81.365124
1966	81.763251
1967	81.712132
1968	81.30014
1969	80.586256
1970	80.502137
1971	81.111284
1972	81.267819
1973	81.642018
1974	81.563613
1975	82.283278
1976	82.376244
1977	82.459484
1978	82.372747
1979	82.21313
1980	81.943111
1981	82.303051
1982	82.526705
1983	82.268581
1984	82.356016
1985	83.016855
1986	82.921903
1987	83.622081
1988	83.632097
1989	83.897232
1990	83.782235
1991	84.137212
1992	84.541776
1993	85.156293
1994	85.552021
1995	85.403182
1996	86.491077
1997	86.452072
1998	87.196781
1999	87.439453
2000	87.637963
2001	87.806355
2002	88.190123
2003	87.874011
2004	88.650693
2005	88.636398
2006	89.005886
2007	89.315257
2008	89.411731
2009	89.647241
2010	90.051525
2011	90.196596
2012	90.294079
2013	90.521863
2014	91.079388
2015	91.10943
2016	91.211612
2017	91.351683
2018	91.254472
2019	91.295525
2020	91.47037
2021	90.52963
2022	90.832654