Year	% of cohort
1992	50.209659576416
1993	50.7617797851562
1996	53.8254699707031
1997	58.4492797851562
1998	56.1885681152344
1999	53.7610015869141
2000	54.0854187011719
2001	63.016788482666
2002	64.992057800293
2003	63.3821792602539
2004	62.5367813110352
2005	61.8310508728027
2006	61.2468185424805
2007	67.827522277832
2008	69.3623123168945
2009	71.5402908325195
2010	69.2125091552734
2011	71.1483688354492
2012	74.4009399414062
2013	79.1284713745117
2014	80.366943359375
2015	80.6942367553711
2016	82.5692977905273
2017	83.4691772460938
2018	84.878288269043
2019	84.4896011352539