Year	% of cohort
1970	41.2651214599609
1971	56.1652984619141
1972	61.6980514526367
1973	73.3511123657227
1974	54.9961700439453
1975	52.1850891113281
1976	50.3727912902832
1977	51.995189666748
1978	52.3961791992188
1979	55.1013107299805
1980	59.9807090759277
1981	65.2834014892578
1982	59.295768737793
1983	58.0038185119629
1984	65.9954833984375
1985	60.1130714416504
1986	67.3932495117188
1987	66.9100112915039
1988	59.6382789611816
1989	65.7893371582031
1990	70.7225494384766
1991	66.4189300537109
1992	60.5694808959961
1993	79.5020904541016
1994	75.3051071166992
1995	63.130931854248
1996	68.3747406005859
1997	73.1682968139648
1998	68.7502822875977
1999	74.5619506835938
2000	67.1598205566406
2001	72.8161315917969
2002	77.0280380249023
2003	63.4228401184082
2004	73.3733215332031
2005	74.3095016479492
2006	62.1677284240723
2007	80.411262512207
2008	72.0044631958008
2009	80.4762725830078
2010	75.3504333496094
2011	76.4353713989258
2012	69.0806884765625
2013	79.5611801147461
2014	77.3252182006836
2015	83.7048187255859
2022	84.3203125