Year	% of cohort
1972	64.8759536743164
1973	63.2787590026855
1974	64.2407379150391
1975	67.9836578369141
1976	67.9861602783203
1977	69.0018997192383
1978	72.1808776855469
1979	71.8795394897461
1980	70.9932479858398
1981	73.986213684082
1982	77.2340927124023
1983	80.9722366333008
1984	84.8536834716797
1985	90.851806640625
1986	87.2574691772461
1987	88.2153930664062
1988	85.9411315917969
1989	86.9720687866211
1990	87.8381729125977
1991	89.2445068359375
1992	88.070182800293
1993	89.9612808227539
1994	87.3993377685547
1995	90.0034713745117
1996	91.5793991088867
1998	92.9277725219727
1999	93.1439971923828
2000	95.4299011230469
2001	95.5668792724609
2002	95.5688934326172
2003	95.4218215942383
2004	95.1296615600586
2005	92.1704711914062
2006	94.6823425292969
2007	94.6923904418945
2009	97.1044387817383
2010	95.1325531005859
2011	94.5527801513672
2012	97.6710510253906
2013	94.5389404296875
2014	94.6390228271484
2015	94.0604400634766
2016	95.9844665527344
2017	97.2509994506836
2018	91.8907470703125
2020	87.7981491088867
2021	93.4629135131836