Year	% of cohort
1971	40.6304397583008
1975	54.2527885437012
1976	56.3756790161133
1977	63.1119499206543
1979	52.4820518493652
1980	52.4563484191895
1987	63.5649108886719
1991	47.3267517089844
1992	62.3738288879395
1993	55.9523887634277
2007	76.1386032104492
2009	54.802360534668
2010	54.4702606201172
2011	70.7254486083984
2012	55.4417381286621
2014	45.2553901672363
2020	73.294548034668