Year	% of cohort
1992	53.5885696411133
1993	53.1334190368652
1996	55.5146293640137
1997	59.7234497070312
1998	54.2943687438965
1999	54.566478729248
2000	53.4781799316406
2001	62.6553688049316
2002	64.4685363769531
2003	62.8996391296387
2004	63.3260383605957
2005	62.2340202331543
2006	61.6126899719238
2007	66.9750595092773
2008	68.4520492553711
2009	71.0538482666016
2010	68.0158767700195
2011	69.9473571777344
2012	73.3374176025391
2013	77.6148681640625
2014	78.7229766845703
2015	79.634033203125
2016	81.0819702148438
2017	82.1709518432617
2018	82.948127746582
2019	82.0526733398438