Year	% of cohort
1994	42.2662315368652
1997	46.4933891296387
1998	52.2903213500977
2000	62.8425102233887
2001	69.5752105712891
2002	62.3476600646973
2003	61.2945594787598
2004	64.8502426147461
2005	63.7720794677734
2006	63.5892486572266
2007	64.7994995117188
2010	68.5542907714844
2011	74.790641784668
2015	83.6587066650391
2016	82.6204528808594
2017	92.4251022338867
2018	87.2061767578125
2019	87.7660980224609