Year	% of cohort
1985	95.6439895629883
1986	97.0081481933594
1987	96.0344772338867
1988	96.4976806640625
1989	83.7251892089844
1990	93.6805725097656
1991	92.3345031738281
1992	91.5143508911133
1993	85.4973220825195
1995	95.2091217041016
1996	89.6440124511719
1997	88.6417617797852
1998	90.1973266601562
1999	92.6419982910156
2000	94.7278518676758
2001	92.6137084960938
2002	94.0859222412109
2003	93.1124420166016
2004	91.3640823364258
2005	95.058723449707
2006	93.9209899902344
2007	93.2598495483398
2008	93.9973220825195
2009	97.6165008544922
2010	96.8138275146484
2011	97.466438293457
2012	96.1876525878906
2013	97.5040893554688
2014	96.0867309570312
2015	93.5630111694336
2016	94.3584823608398
2017	96.4478302001953
2018	96.0066528320312
2019	95.6237411499023
2020	97.9377136230469