Year	% of cohort
1970	72.1561126708984
1971	72.038688659668
1972	73.4742736816406
1973	73.4329376220703
1974	74.2571411132812
1975	75.7382125854492
1976	75.2566299438477
1977	75.5226516723633
1978	74.3929672241211
1979	75.7660217285156
1980	76.4839019775391
1981	77.767692565918
1982	78.1204605102539
1983	79.2237701416016
1984	80.2210006713867
1985	81.6220169067383
1986	81.4994888305664
1987	83.6667098999023
1988	81.7016677856445
1989	83.8645477294922
1990	84.4763717651367
1991	84.4109573364258
1992	84.6453323364258
1993	84.4341506958008
1994	84.2048263549805
1995	84.7695083618164
1996	85.1516265869141
1997	84.8125686645508
1998	85.2205505371094
1999	85.7804489135742
2000	85.8511962890625
2001	84.3279037475586
2002	83.3168487548828
2003	82.683952331543
2004	81.4784622192383
2005	81.3471908569336
2006	82.8613510131836
2007	83.6509094238281
2008	84.2960205078125
2009	85.4355316162109
2010	86.0325775146484
2011	85.5995635986328
2012	81.770622253418
2013	81.6887283325195
2014	81.9099426269531
2015	83.3982925415039
2016	83.576530456543
2017	84.0003967285156
2018	84.8274002075195
2019	85.1445007324219
2020	85.1914215087891
2021	87.3293533325195