Year	% of cohort
1970	88.1849670410156
1971	79.4283981323242
1972	78.5960693359375
1973	78.2484970092773
1974	79.772102355957
1975	78.4219589233398
1976	82.9686584472656
1977	80.623046875
1978	76.5673904418945
1979	76.6921615600586
1980	76.6108779907227
1981	80.5506286621094
1982	77.9547500610352
1983	83.9567565917969
1984	80.9880981445312
1985	83.7891311645508
1986	82.6525573730469
1987	75.7974090576172
1988	81.531852722168
1999	91.9491882324219
2000	88.6287612915039
2001	89.8247985839844
2004	85.3160171508789
2005	87.9931564331055
2006	90.0107574462891
2007	87.4026565551758
2008	89.3234405517578
2009	94.5850601196289
2010	94.8726425170898
2011	92.061149597168
2012	94.0059280395508
2013	88.7226181030273
2019	95.3194198608398