Year	% of cohort
1972	5.26068019866943
1973	37.9161987304688
1974	51.2129592895508
1975	46.1264801025391
1976	43.3972396850586
1977	65.7314987182617
1978	46.9247016906738
1979	62.7635917663574
1980	71.935676574707
1987	81.944450378418
1988	59.7056617736816
1989	63.8086013793945
1991	54.6836585998535
2000	53.6410293579102
2001	54.5959587097168
2002	66.6335678100586
2003	57.761848449707
2004	65.5174102783203
2006	68.4529800415039
2007	63.8943786621094
2009	61.0761299133301
2010	54.4852485656738
2011	47.2705383300781
2012	50.9612998962402
2013	59.0685615539551
2014	48.306999206543
2015	47.6685905456543
2016	46.0094184875488
2017	47.3229293823242
2018	47.5691413879395
2019	53.7120399475098