Year	% of cohort
1971	46.8928909301758
1972	51.4112892150879
1973	51.1049880981445
1974	51.2951583862305
1975	60.1371994018555
1976	62.6960792541504
1977	68.6701278686523
1989	67.6967010498047
1990	75.5241317749023
1991	59.5942687988281
1992	66.4243316650391
1995	63.6670303344727
1996	67.9094619750977
1997	64.6361618041992
1998	59.0150299072266
1999	54.2917709350586
2000	67.0327835083008
2001	62.7917289733887
2002	64.9292602539062
2003	67.7773818969727
2006	66.9164428710938
2007	75.6718063354492
2008	63.5905685424805
2009	60.443431854248
2010	66.8733825683594
2012	58.5522918701172
2013	65.6641006469727
2021	61.7885093688965