Year	% of cohort
1960	73.359954
1961	74.199334
1962	74.621081
1963	75.97075
1964	77.027801
1965	77.935385
1966	78.36501
1967	78.651767
1968	79.275794
1969	79.662897
1970	80.627936
1971	81.663741
1972	82.208733
1973	82.82249
1974	83.249055
1975	83.4084
1976	83.516139
1977	83.398021
1978	83.828995
1979	84.25342
1980	85.245113
1981	86.088846
1982	86.368424
1983	86.578216
1984	86.912279
1985	87.523553
1986	87.979662
1987	88.414912
1988	88.671622
1989	88.90287
1990	89.351049
1991	89.588745
1992	90.007721
1993	90.454036
1994	90.871341
1995	91.32224
1996	91.594916
1997	91.841812
1998	92.199607
1999	92.421956
2000	92.767916
2001	93.082931
2002	93.209095
2003	93.021284
2004	93.280281
2005	93.443429
2006	93.599859
2007	93.710877
2008	93.763904
2009	93.846922
2010	94.096214
2011	94.232949
2012	94.425267
2013	94.565395
2014	94.687549
2015	94.815892
2016	95.030893
2017	95.29368
2018	95.526926
2019	95.490679
2020	95.651716
2021	95.797661
2022	94.994296