Year	% of cohort
1995	96.038688659668
1998	97.1651077270508
1999	99.2523880004883
2000	97.9251480102539
2001	98.4196624755859
2002	98.015380859375
2003	98.0467987060547
2004	98.7533111572266
2005	96.9386215209961
2006	96.7318878173828
2007	97.5249633789062
2008	98.6017990112305
2009	97.6327209472656
2010	97.1826782226562
2011	96.5749130249023
2012	96.4572296142578
2013	97.6277923583984
2014	98.3199462890625
2015	99.0446166992188
2016	99.4003829956055
2017	99.5791015625
2018	99.6889801025391
2019	99.6509780883789
2020	99.6400299072266
2021	99.7968978881836