Year	% of cohort
1960	64.834405
1961	65.95265
1962	66.517549
1963	67.998324
1964	68.786616
1965	69.018901
1966	70.125189
1967	71.018056
1968	71.506808
1969	71.854418
1970	72.198799
1971	73.719991
1972	74.416201
1973	75.093082
1974	75.994502
1975	76.860447
1976	77.522392
1977	78.240203
1978	78.825755
1979	79.393445
1980	79.462298
1981	80.005894
1982	80.496856
1983	80.315718
1984	80.71098
1985	81.255701
1986	81.635978
1987	82.038533
1988	82.148462
1989	82.593166
1990	82.587441
1991	82.817283
1992	82.739548
1993	82.906749
1994	83.403268
1995	83.310641
1996	83.932699
1997	84.328906
1998	84.094785
1999	84.172144
2000	84.668511
2001	85.071609
2002	85.410849
2003	85.360448
2004	85.708567
2005	85.651153
2006	86.131265
2007	86.390895
2008	86.615792
2009	86.833466
2010	87.009031
2011	86.890756
2012	87.742959
2013	88.05588
2014	88.421175
2015	88.789764
2016	89.027138
2017	89.345526
2018	89.481442
2019	89.609494
2020	89.722458
2021	90.654491
2022	89.99677