Year	% of cohort
1991	51.7386016845703
1999	62.5118408203125
2002	67.4051971435547
2003	64.9583511352539
2004	67.0336074829102
2007	63.7369117736816
2012	55.913330078125
2013	61.8891181945801
2014	71.7382125854492
2015	78.2974090576172
2016	73.4071426391602