Year	% of cohort
1981	49.9163208007812
1986	56.3916206359863
1987	49.2317314147949
1988	29.7063903808594
1993	61.1119995117188
1994	51.4209403991699
1995	56.5340003967285
1998	48.3699989318848
1999	55.2457885742188
2000	63.9354591369629
2001	62.1080703735352
2002	58.8711891174316
2003	53.4106216430664
2004	68.1564788818359
2005	64.0200729370117
2006	63.5408706665039
2007	49.3114395141602
2008	42.9980506896973
2009	42.623218536377
2010	47.9306182861328
2011	41.9040985107422
2014	43.2226905822754