Year	% of cohort
1992	56.4500694274902
1993	55.0698204040527
1996	56.8969802856445
1997	60.8151817321777
1998	52.6715888977051
1999	55.258731842041
2000	52.9532814025879
2001	62.3508911132812
2002	64.0281982421875
2003	62.4872817993164
2004	64.0142211914062
2005	62.5774803161621
2006	61.9262886047363
2007	66.2100296020508
2008	67.6159133911133
2009	70.606689453125
2010	66.9277572631836
2011	68.8480606079102
2012	72.3630905151367
2013	76.2326736450195
2014	77.221061706543
2015	78.6519165039062
2016	79.7156677246094
2017	80.963737487793
2018	81.1675872802734
2019	79.8187103271484