Year	% of cohort
1960	63.92575333174657
1961	64.4701030213193
1962	64.20271441132398
1963	64.47820229308176
1964	65.23285183004889
1965	65.2376100605029
1966	65.53056105153865
1967	65.73648556179259
1968	65.53187073371232
1969	65.20925307140095
1970	65.78380486588514
1971	66.18491104894896
1972	66.51682740799622
1973	66.86031445884608
1974	67.43044358427356
1975	67.57728030168596
1976	67.83119918264482
1977	68.18595225800182
1978	68.33765896154547
1979	68.70112240077721
1980	68.71055514211952
1981	69.45692294053602
1982	70.02591137331937
1983	70.02769358515486
1984	70.31050693038223
1985	70.73589546985295
1986	71.67059999050821
1987	72.00519547058917
1988	72.17745355475543
1989	72.34084694860323
1990	72.48286751923516
1991	72.60798920444245
1992	72.66839221559754
1993	72.10470489890677
1994	72.10176355441679
1995	72.40419324315157
1996	73.41083767942408
1997	74.41584454507465
1998	74.91457309827062
1999	74.83006920544268
2000	75.1250213591503
2001	75.48717786842123
2002	75.6195472930687
2003	75.77598018681785
2004	76.42951470421683
2005	76.68257226249648
2006	77.45980879543009
2007	78.04609696055718
2008	78.43884332254797
2009	78.98752847880482
2010	79.40470424545875
2011	79.91933912494744
2012	80.34629198892706
2013	80.72275624227143
2014	81.05007783706061
2015	81.2348159791513
2016	81.54740118100977
2017	81.96165149273519
2018	82.13444636743743
2019	82.50516310974359
2020	80.95497091348332
2021	79.98422339371452
2022	81.06541856863213