Year	% of cohort
1991	65.7546005249023
1994	67.2937774658203
1999	73.4740219116211
2005	92.6188507080078
2006	86.117073059082
2007	90.0095672607422
2008	96.1940307617188
2009	91.4336166381836
2010	88.752082824707
2012	91.367073059082
2013	93.5308532714844
2014	99.7655181884766
2016	95.4157867431641
2017	96.158447265625
2019	88.3167114257812
2020	96.7825164794922