Year	% of cohort
1989	53.3923492431641
1990	72.6336517333984
1991	74.3420028686523
1992	78.8665771484375
1993	69.0645980834961
1994	63.1503105163574
1995	62.3205490112305
1996	67.696403503418
1997	65.1353225708008
1998	66.9004821777344
2001	55.8227310180664
2004	54.7332496643066
2005	56.1670608520508
2006	64.9377136230469
2008	83.2864074707031
2012	75.3098297119141
2016	73.2689666748047