Year	% of cohort
1960	56.738078
1961	58.48988
1962	59.883856
1963	59.966874
1964	60.550825
1965	61.316127
1966	62.116054
1967	62.438304
1968	62.701187
1969	63.372951
1970	63.862593
1971	64.073936
1972	64.335406
1973	65.328111
1974	66.027607
1975	67.219529
1976	67.830801
1977	68.594838
1978	69.245797
1979	69.684994
1980	70.058737
1981	70.416894
1982	70.892256
1983	71.782066
1984	73.019113
1985	74.388451
1986	75.667168
1987	76.615526
1988	76.467272
1989	76.828052
1990	76.918375
1991	77.313003
1992	77.832078
1993	78.277703
1994	78.678756
1995	78.976316
1996	79.955703
1997	81.133576
1998	82.347829
1999	83.23186
2000	84.115348
2001	84.245667
2002	84.27683
2003	84.219283
2004	84.713602
2005	85.424852
2006	85.974252
2007	86.367704
2008	86.794517
2009	87.25963
2010	87.640543
2011	87.951022
2012	88.24497
2013	88.610786
2014	88.750032
2015	88.964376
2016	89.157574
2017	89.425094
2018	89.710777
2019	90.054775
2020	90.299722
2021	90.71156
2022	90.448711