Year	% of cohort
1971	73.0406875610352
1972	72.8673706054688
1973	73.8956527709961
1974	75.1711196899414
1975	77.1071624755859
1976	76.5767364501953
1977	77.7574462890625
1978	78.7923126220703
1979	78.4927062988281
1980	78.9278335571289
1981	79.2976226806641
1982	79.3315582275391
1983	78.0442123413086
1984	78.4385070800781
1985	77.4504318237305
1986	78.2194900512695
1987	77.7057113647461
1988	78.044792175293
1989	76.7165603637695
1990	77.3066864013672
1991	76.5716705322266
1992	76.5414199829102
1993	77.2125015258789
1994	76.6058807373047
1995	75.9775695800781
1996	76.3671798706055
1997	76.3509826660156
1998	76.4288635253906
1999	75.53173828125
2000	75.5665893554688
2001	74.2591018676758
2002	71.0271224975586
2003	69.7485961914062
2004	66.9587478637695
2005	70.0405120849609
2006	55.7529411315918
2007	53.6034698486328
2008	68.8583221435547
2009	62.8951683044434
2010	63.4145698547363
2011	64.4037017822266
2012	63.8915100097656
2013	64.5535736083984
2014	64.6324768066406
2015	63.5909004211426
2016	61.428768157959
2017	62.9768981933594
2018	64.2695922851562
2019	65.1424179077148
2020	65.6373596191406
2021	64.7006607055664