Year	% of cohort
1972	68.7303237915039
1973	70.2221221923828
1974	74.6113891601562
1976	79.8583374023438
1977	83.454460144043
1978	85.3563613891602
1979	82.1189727783203
1980	80.3429107666016
1981	79.5853271484375
1982	78.059211730957
1983	75.2008895874023
1984	66.2496032714844
1985	66.6637420654297
1986	66.9793472290039
1987	65.7544403076172
1988	63.0439414978027
1989	76.1572723388672
1990	73.4074096679688
1991	75.8669662475586
1992	79.701042175293
1993	79.6738815307617
1994	78.9767379760742
1995	76.6911926269531
1996	73.9647979736328
1997	74.1513824462891
1998	78.0590896606445
1999	82.0437927246094
2000	80.9903869628906
2001	83.3983917236328
2002	80.4514694213867
2003	74.1340179443359
2004	77.0881881713867
2005	78.8272018432617
2006	83.226921081543
2007	82.4677734375
2008	84.5389785766602
2009	93.8718185424805
2010	92.9542770385742
2011	91.5151824951172
2012	94.1080703735352
2013	92.6376495361328
2014	91.543212890625
2015	96.4979019165039
2016	97.9695129394531
2017	96.3896865844727
2018	96.9934387207031
2019	97.4807968139648
2020	94.6814422607422
2021	98.8353576660156