Year	% of cohort
1971	65.5915832519531
1972	61.3536186218262
1973	45.034969329834
1975	59.8112411499023
1976	48.731258392334
1977	50.7272300720215
1978	55.2160797119141
1979	53.5610008239746
1980	52.6531181335449
1982	56.0914306640625
1983	34.3075408935547
1984	50.8322486877441
1985	36.6522216796875
1986	43.4936790466309
1987	34.298999786377
1988	40.0177803039551
1989	7.54083013534546
1990	62.9644813537598
1991	46.195629119873
1992	61.7384414672852
1993	46.9666213989258
1994	55.8949584960938
1995	51.5657386779785
1996	57.8690605163574
1997	56.7060394287109
2000	75.7392807006836
2001	68.2154006958008
2002	59.1062316894531
2003	64.2702484130859
2009	53.9367599487305
2010	55.7844314575195
2011	59.2612609863281
2012	53.2349014282227
2013	53.3870010375977
2014	57.2620811462402
2015	47.4922409057617
2018	33.9159393310547
2019	38.7663803100586
2020	54.1188201904297
2021	54.1278114318848