Year	% of cohort
1970	48.2555389404297
1971	47.4993515014648
1972	47.3498802185059
1973	47.9827919006348
1974	48.959659576416
1975	49.7963714599609
1976	50.2579383850098
1977	52.013069152832
1978	52.7173500061035
1979	53.9550704956055
1980	54.2120208740234
1981	55.1523895263672
1982	56.2377815246582
1983	56.9240493774414
1984	57.8748092651367
1985	59.0853118896484
1986	60.7391395568848
1987	64.9541778564453
1988	64.9974899291992
1989	65.1662902832031
1990	65.307243347168
1991	65.1937103271484
1992	65.1332397460938
1993	65.1445693969727
1994	65.0573501586914
1995	65.7987976074219
1996	66.4274826049805
1997	66.9134521484375
1998	67.8923034667969
1999	68.4823303222656
2000	67.9393692016602
2001	70.8780136108398
2002	70.4789123535156
2003	70.7671432495117
2004	71.2403182983398
2005	72.0725936889648
2006	70.9450988769531
2007	71.3384628295898
2008	73.7591705322266
2009	74.703742980957
2010	74.7587432861328
2011	76.3928604125977
2012	76.8539505004883
2013	78.7236099243164
2014	84.0394134521484
2015	83.5471267700195
2016	81.287727355957
2017	81.072021484375
2018	81.8366012573242
2019	86.5190277099609
2020	86.1421966552734
2021	87.2690505981445