Year	% of cohort
1960	39.555843
1961	40.679169
1962	41.665742
1963	42.938968
1964	44.596627
1965	46.704813
1966	49.109596
1967	51.444219
1968	53.694312
1969	55.419288
1970	56.533081
1971	57.015718
1972	42.988798
1973	57.215737
1974	57.219034
1975	57.450407
1976	57.949771
1977	58.570782
1978	57.129671
1979	57.064103
1980	61.113745
1981	61.774055
1982	62.344914
1983	62.476192
1984	62.85609
1985	63.601929
1986	64.688601
1987	65.427397
1988	66.825409
1989	68.32691
1990	69.208131
1991	70.074044
1992	70.517057
1993	71.153677
1994	71.899036
1995	72.379174
1996	72.983887
1997	73.625592
1998	70.338775
1999	74.399279
2000	74.567953
2001	74.57982
2002	74.599218
2003	74.695613
2004	74.990886
2005	75.670005
2006	76.64886
2007	77.559194
2008	78.878151
2009	79.920384
2010	80.68841
2011	81.354066
2012	81.809212
2013	82.138407
2014	82.463923
2015	82.788965
2016	83.155637
2017	83.51207
2018	83.912572
2019	84.281974
2020	81.440428
2021	83.814803
2022	85.129081