Year	% of cohort
1986	26.8324604034424
1987	26.4968700408936
1988	39.0981292724609
1989	48.3610000610352
1990	37.0225982666016
1991	36.6222801208496
1992	39.1174011230469
1993	48.4776000976562
1994	51.985179901123
1998	49.8745498657227
1999	47.3750991821289
2000	56.5569000244141
2001	53.1218605041504
2004	66.0197830200195
2005	59.4330291748047
2006	67.7679290771484
2007	62.7007904052734
2008	56.1114883422852
2009	56.0864486694336
2010	45.0705604553223
2011	50.5876998901367
2012	51.4455718994141
2013	49.3820915222168
2014	51.1394195556641
2017	56.9662399291992
2018	58.9310302734375
2019	56.8686904907227