Year	% of cohort
1960	39.597536
1961	40.963302
1962	42.711645
1963	43.257646
1964	44.606955
1965	43.612345
1966	45.860368
1967	46.132388
1968	46.549223
1969	46.562084
1970	39.078723
1971	4.520402
1972	47.398544
1973	47.711804
1974	46.68224
1975	48.274105
1976	49.34075
1977	49.725838
1978	49.646779
1979	49.678943
1980	49.848746
1981	50.221869
1982	50.430217
1983	50.911663
1984	51.249765
1985	51.222796
1986	52.084357
1987	52.398313
1988	52.08899
1989	52.66133
1990	54.485729
1991	51.311319
1992	55.550608
1993	55.791841
1994	56.494907
1995	57.667902
1996	58.112282
1997	60.125148
1998	64.408641
1999	68.670809
2000	66.758418
2001	66.829499
2002	66.708297
2003	66.369101
2004	66.881772
2005	66.611104
2006	66.242957
2007	65.103586
2008	65.292342
2009	66.200959
2010	68.259725
2011	68.517466
2012	69.007915
2013	67.975364
2014	69.597261
2015	70.718042
2016	71.753651
2017	73.045261
2018	74.908517
2019	74.527276
2020	74.108198
2021	72.618675
2022	75.779057