Year	% of cohort
1970	40.0647087097168
1971	39.5096092224121
1972	39.4123802185059
1973	39.5530891418457
1974	40.375659942627
1975	41.3318099975586
1976	42.199779510498
1977	43.3544883728027
1978	44.4300804138184
1979	45.4652404785156
1980	46.1303787231445
1981	47.1386299133301
1982	48.276798248291
1983	49.5101699829102
1984	50.830150604248
1985	52.0686798095703
1986	53.3790397644043
1987	60.8297080993652
1988	61.0822715759277
1989	60.7203903198242
1990	60.4965515136719
1991	60.1904907226562
1992	59.9597015380859
1993	59.7458915710449
1994	59.551830291748
1995	60.2467498779297
1996	60.9508094787598
1997	61.6309700012207
1998	62.0949516296387
1999	62.9984588623047
2000	60.9216117858887
2001	62.9289703369141
2002	64.2630615234375
2003	65.5977935791016
2004	66.8258590698242
2005	67.9147262573242
2006	69.1128921508789
2007	70.2374725341797
2008	71.1626129150391
2009	72.4834594726562
2010	72.4960327148438
2011	74.6385803222656
2012	75.9648513793945
2013	79.3690719604492
2014	87.5882568359375
2015	85.5921401977539
2016	83.1872177124023
2017	82.0473098754883
2018	80.7511901855469
2019	89.0087738037109
2020	89.2286605834961
2021	90.692626953125