Year	% of cohort
1970	49.8668212890625
1971	49.3559608459473
1972	49.095401763916
1973	49.7251014709473
1974	50.6828117370605
1975	51.3128509521484
1976	51.8415603637695
1977	53.2874603271484
1978	53.8912582397461
1979	55.0313186645508
1980	55.3212585449219
1981	56.2405395507812
1982	56.8911399841309
1983	57.5701789855957
1984	58.3236503601074
1985	59.4822692871094
1986	61.1535911560059
1987	65.8013916015625
1988	66.0620193481445
1989	66.1876831054688
1990	66.2819976806641
1991	66.0844421386719
1992	66.055290222168
1993	65.9618606567383
1994	65.7881774902344
1995	66.2636489868164
1996	66.7123870849609
1997	67.0505905151367
1998	67.7470092773438
1999	68.186393737793
2000	67.0867767333984
2001	69.0027770996094
2002	68.7886810302734
2003	69.2863922119141
2004	69.7760162353516
2005	70.6199569702148
2006	69.8379364013672
2007	70.5430908203125
2008	73.1905212402344
2009	73.8150100708008
2010	73.7366561889648
2011	75.2995071411133
2012	75.9778366088867
2013	78.1007766723633
2014	83.1933670043945
2015	82.3539428710938
2016	80.8782196044922
2017	80.4447631835938
2018	80.1353378295898
2019	84.6417007446289
2020	84.5029907226562
2021	85.7575378417969