Year	% of cohort
1960	70.093088
1961	69.108897
1962	69.123315
1963	69.426653
1964	68.982706
1965	69.677179
1966	69.301065
1967	70.925705
1968	69.688562
1969	69.719262
1970	69.391324
1971	70.677128
1972	69.437122
1973	69.927701
1974	70.07399
1975	70.905989
1976	71.448505
1977	71.438187
1978	70.834856
1979	70.752935
1980	71.544355
1981	72.558918
1982	73.33152
1983	72.708158
1984	73.848672
1985	73.816013
1986	74.412689
1987	75.494727
1988	76.032168
1989	76.488919
1990	76.903876
1991	77.350161
1992	78.863338
1993	78.373196
1994	79.126806
1995	79.077964
1996	79.546643
1997	80.130901
1998	80.133735
1999	80.553558
2000	81.07687
2001	81.784934
2002	82.341978
2003	83.439185
2004	83.897657
2005	84.760422
2006	85.146455
2007	85.291011
2008	85.62492
2009	85.672315
2010	86.49059
2011	86.458144
2012	86.785813
2013	87.278615
2014	87.667829
2015	88.335764
2016	88.42802
2017	88.923608
2018	89.125243
2019	89.325989
2020	90.195701
2021	89.68202
2022	90.067979