Year	% of cohort
1971	67.4040908813477
1972	65.2886123657227
1973	68.8426971435547
1974	74.9418029785156
1975	89.0177993774414
1976	80.1907196044922
1977	83.0220184326172
1978	84.6021270751953
1979	81.8627777099609
1980	80.2362594604492
1981	80.2567672729492
1982	76.9419097900391
1983	79.4060974121094
1984	67.9145126342773
1985	67.7019424438477
1986	68.9597702026367
1987	66.5777435302734
1988	63.1642913818359
1989	75.6447525024414
1990	73.5273590087891
1991	68.1993713378906
1992	73.7424011230469
1993	73.5024108886719
1994	74.2153930664062
1995	71.8605117797852
1996	68.2188034057617
1997	67.6598815917969
1998	69.9011688232422
1999	75.0897064208984
2000	73.2776184082031
2001	77.9721221923828
2002	75.5917587280273
2003	69.4094390869141
2004	72.6169662475586
2005	73.7061767578125
2006	77.5759582519531
2007	76.2110214233398
2008	78.0733413696289
2009	90.5178298950195
2010	89.4241409301758
2011	88.2365112304688
2012	91.5594177246094
2013	89.2543411254883
2014	88.8388366699219
2015	92.6300430297852
2016	95.0526733398438
2017	92.986686706543
2018	94.2649002075195
2019	95.0742111206055
2020	91.9933776855469
2021	97.9330596923828