Year	% of cohort
1983	47.4285087585449
1984	43.5975608825684
1985	47.758129119873
1986	51.2400016784668
1987	49.2716407775879
1988	56.4868087768555
1989	47.4311408996582
1990	69.3973388671875
1991	57.4885101318359
1992	77.8121719360352
1993	75.0398330688477
2003	81.4204483032227
2004	73.1396484375
2005	76.943229675293
2006	80.6279067993164
2007	59.7248497009277
2008	67.8516235351562
2009	74.2529678344727
2011	62.5787200927734
2013	66.6846618652344