Year	% of cohort
1973	69.8020324707031
1977	94.9454193115234
1978	93.7568969726562
1979	91.4782028198242
1980	91.2404098510742
1984	95.0228424072266
1991	98.4373474121094
1992	97.4891586303711
1994	93.1990585327148
1996	97.9262390136719
1997	96.7389373779297
1998	97.1390914916992
1999	98.1549377441406
2000	97.9339370727539
2001	98.2278213500977
2002	97.3803787231445
2006	95.7798309326172
2007	94.89111328125
2008	79.672721862793
2010	95.7494125366211
2011	94.463493347168
2012	98.2629699707031
2013	96.8755416870117
2014	96.5730590820312
2016	93.8066635131836
2018	97.1787109375
2019	98.0433731079102
2020	96.018180847168
2021	96.3404998779297