Year	% of cohort
1973	47.5229301452637
1974	50.5451698303223
1975	38.6906585693359
1976	36.7550392150879
1977	37.2008018493652
1978	38.9488410949707
1979	45.809398651123
1980	37.7555618286133
1981	43.9978218078613
1982	30.0857601165771
1983	34.2181015014648
1984	45.9729995727539
1985	44.3773803710938
1986	57.1262397766113
1987	43.8268508911133
1988	60.3957290649414
1989	53.2636909484863
1990	46.3072509765625
1991	64.4709777832031
1992	41.9401397705078
1993	37.3403205871582
1995	34.200740814209
1998	44.1681213378906
1999	48.4827308654785
2000	48.8062782287598
2001	43.8588218688965
2004	42.2400207519531
2005	44.4457702636719
2006	43.5875205993652
2007	68.2262115478516
2008	50.6875686645508
2009	60.8601684570312
2010	59.256519317627
2011	57.7070693969727
2012	70.1109924316406
2013	64.443489074707
2018	71.6671371459961