Year	% of cohort
1970	48.064079284668
1971	46.6489715576172
1972	46.9234008789062
1973	46.2167282104492
1974	45.9412689208984
1975	48.8089904785156
1976	53.1781806945801
1977	52.6507682800293
1978	52.7088012695312
1979	52.1198997497559
1980	51.1835899353027
1981	54.3403701782227
1982	57.7514991760254
1983	58.7160606384277
1984	54.5092811584473
1985	57.1339416503906
1986	59.730598449707
1987	59.3117599487305
1988	61.2111206054688
1989	62.1874504089355
1990	65.1058807373047
1991	67.6458129882812
1992	66.59765625
1993	69.2794799804688
1994	69.8532485961914
1995	72.0809783935547
1996	72.4410171508789
1997	73.4748992919922
1998	74.3442993164062
1999	76.1464309692383
2000	75.61083984375
2001	78.5609512329102
2002	78.0174179077148
2003	78.6292419433594
2004	79.1892318725586
2005	79.5441589355469
2006	80.6522827148438
2007	80.424201965332
2008	82.5658493041992
2009	82.9028930664062
2010	83.0150375366211
2011	82.4276428222656
2012	82.2001419067383
2013	83.4812927246094
2014	84.4479370117188
2015	83.4266510009766
2016	85.4473037719727
2017	85.1289520263672
2018	85.4891586303711
2019	85.4571075439453
2020	86.3312911987305
2021	86.3932189941406