Year	% of cohort
1970	75.2336196899414
1973	77.5387802124023
1974	72.6144409179688
1975	75.8264312744141
1996	70.1163864135742
1998	90.4637069702148
1999	96.2877807617188
2000	92.9591522216797
2001	92.108757019043
2002	84.2322235107422
2003	96.3128890991211
2004	89.6829605102539
2005	95.9879302978516
2006	96.3018188476562
2007	98.1681365966797
2008	95.3454208374023
2009	96.5689086914062
2010	94.8981628417969
2011	97.3665618896484
2012	95.9745483398438
2013	97.1126403808594
2014	96.3750915527344
2015	98.2601165771484
2016	95.4963684082031
2017	95.5091934204102
2018	95.0482788085938
2019	95.2035675048828
2020	96.9821929931641