Year	% of cohort
1976	89.888801574707
1977	90.2751312255859
1978	86.4377365112305
1979	89.2340393066406
1980	88.7820205688477
1981	88.5603408813477
1982	90.4613571166992
1983	88.8402633666992
1984	89.6174621582031
1985	90.1881103515625
1988	87.9170074462891
1989	88.853759765625
1990	88.4918899536133
1992	88.0593414306641
1993	90.5925674438477
1994	91.3823623657227
1995	92.1427993774414
1996	90.406379699707
1998	90.9733581542969
1999	91.4832534790039
2000	92.4760971069336
2001	95.2326965332031
2002	95.6329803466797
2003	96.3805084228516
2004	96.5039978027344
2005	96.4624328613281
2006	96.4484634399414
2007	95.8217620849609
2008	95.4689407348633
2009	95.9696578979492
2012	97.1443481445312
2013	92.813606262207
2014	96.5913925170898
2015	85.0779724121094
2016	96.548210144043
2020	98.219856262207