Year	% of cohort
1960	78.767076
1961	79.035109
1962	79.283649
1963	79.573627
1964	80.591788
1965	81.414273
1966	81.729774
1967	81.952476
1968	82.643018
1969	81.96216
1970	83.379418
1971	82.962817
1972	84.291152
1973	84.357329
1974	84.824251
1975	85.375118
1976	85.82289
1977	86.485973
1978	86.857376
1979	87.29707
1980	88.001976
1981	88.233656
1982	88.888837
1983	88.88415
1984	89.222887
1985	89.517279
1986	89.645535
1987	89.703546
1988	89.782466
1989	90.057431
1990	90.138506
1991	90.294368
1992	90.697931
1993	90.847507
1994	91.107479
1995	91.27157
1996	91.429493
1997	91.81424
1998	92.114929
1999	92.146188
2000	92.357434
2001	92.507988
2002	92.586643
2003	92.530175
2004	92.888945
2005	92.998557
2006	93.227572
2007	93.185659
2008	93.276057
2009	93.450607
2010	93.615263
2011	93.579664
2012	93.728553
2013	93.778188
2014	93.851391
2015	93.844788
2016	93.978117
2017	93.911435
2018	93.974388
2019	94.085324
2020	93.643215
2021	93.794146
2022	94.564687