Year	% of cohort
1994	56.562141418457
1997	51.4159812927246
1998	52.664421081543
2000	63.1240386962891
2001	71.0903015136719
2002	59.6604385375977
2003	58.2611618041992
2004	61.6133308410645
2005	60.7738189697266
2006	60.9200782775879
2007	59.737060546875
2010	68.7708892822266
2011	70.7282867431641
2015	75.6252899169922
2016	79.1384811401367
2017	86.3372268676758
2018	81.2748031616211
2019	80.7195587158203