Year	% of cohort
1976	35.2359580993652
1988	33.0422096252441
1990	50.7603912353516
1994	26.272310256958
1995	38.2369918823242
1996	56.123950958252
1998	45.8916282653809
1999	51.1419982910156
2000	50.7828712463379
2001	59.0833587646484
2002	53.9852714538574
2004	27.3296604156494
2005	33.7604484558105
2009	28.295970916748
2010	50.89794921875
2011	40.5833015441895
2012	54.409740447998
2015	30.477409362793
2016	23.1964893341064
2017	71.5187835693359