Year	% of cohort
1991	52.1759605407715
1999	59.0416488647461
2002	65.3422775268555
2003	67.6876373291016
2004	61.5584716796875
2007	61.6866989135742
2012	55.2617683410645
2013	60.3601417541504
2014	70.098258972168
2015	76.8510284423828
2016	73.5494384765625