Year	% of cohort
1970	48.1496696472168
1971	47.4186096191406
1972	47.6133613586426
1973	46.7253684997559
1974	46.3721389770508
1975	49.2918090820312
1976	55.1699485778809
1977	54.375129699707
1978	54.2775688171387
1979	53.8694381713867
1980	52.8549995422363
1981	56.1349983215332
1982	59.639778137207
1983	60.6328086853027
1984	56.6385498046875
1985	58.8050498962402
1986	61.2656707763672
1987	61.3063583374023
1988	63.1564292907715
1989	64.1337280273438
1990	67.0498199462891
1991	69.5327835083008
1992	68.2019271850586
1993	70.6955032348633
1994	71.8554306030273
1995	74.17822265625
1996	74.6482467651367
1997	75.754280090332
1998	76.9209594726562
1999	78.0333862304688
2000	77.5554962158203
2001	80.4377899169922
2002	79.8340682983398
2003	80.5113372802734
2004	80.9169921875
2005	81.521858215332
2006	82.7406997680664
2007	82.2613983154297
2008	84.2943878173828
2009	84.4576568603516
2010	84.6224212646484
2011	84.0978469848633
2012	83.7253036499023
2013	85.2340316772461
2014	86.0812301635742
2015	85.3511734008789
2016	86.735969543457
2017	86.6043395996094
2018	87.0402603149414
2019	86.9218597412109
2020	87.662971496582
2021	87.8527603149414