Year	% of cohort
2003	97.2478790283203
2004	86.1139297485352
2007	93.3988876342773
2008	95.6472702026367
2009	94.1808166503906
2011	97.6896514892578
2012	99.8619537353516
2013	98.9467086791992
2014	94.2597885131836
2015	99.5559310913086
2016	99.2091979980469
2017	99.3357620239258
2018	99.1889801025391
2019	98.7546997070312
2020	99.2952270507812
2021	99.426872253418