Year	% of cohort
1971	63.2704582214355
1972	56.629768371582
1973	34.1974411010742
1975	60.234130859375
1976	41.0512504577637
1977	52.0214996337891
1978	57.897388458252
1980	39.1170883178711
1982	55.7112007141113
1983	36.8769989013672
1984	45.4853515625
1985	34.2583312988281
1986	40.2213706970215
1987	31.587760925293
1988	36.066951751709
1989	6.58925008773804
1991	44.6843681335449
1992	59.4710388183594
1993	44.2378692626953
1994	50.4385299682617
1995	45.9213485717773
1996	52.646411895752
1997	53.8396492004395
2000	66.3663177490234
2001	63.0427207946777
2002	54.9399795532227
2003	63.3102798461914
2009	51.3523712158203
2010	52.9566497802734
2011	57.7763786315918
2012	51.5382804870605
2013	52.3281593322754
2014	55.7402610778809
2015	46.3418884277344
2018	32.5001602172852
2019	37.5757789611816
2020	53.2162017822266
2021	54.3765907287598