Year	% of cohort
1960	29.93507
1961	31.900415
1962	33.632524
1963	35.296839
1964	37.326766
1965	38.960564
1966	40.728387
1967	42.159878
1968	43.599083
1969	45.572232
1970	47.019771
1971	48.659579
1972	50.334141
1973	51.291014
1974	53.69996
1975	55.36295
1976	57.552601
1977	58.368641
1978	59.438469
1979	60.384318
1980	61.251205
1981	61.899096
1982	62.362782
1983	63.599054
1984	64.705629
1985	65.2617
1986	66.419277
1987	66.88403
1988	67.963625
1989	68.348581
1990	69.440247
1991	69.981328
1992	71.156075
1993	71.493695
1994	71.750673
1995	72.901673
1996	73.308541
1997	72.78214
1998	72.234368
1999	72.337859
2000	71.022942
2001	71.112603
2002	71.119283
2003	71.411133
2004	72.019092
2005	72.002745
2006	72.027836
2007	72.138112
2008	72.485077
2009	72.536928
2010	72.293008
2011	65.420993
2012	71.087483
2013	71.455268
2014	67.821014
2015	68.270816
2016	68.221535
2017	70.429183
2018	71.122089
2019	70.050697
2020	70.980525
2021	70.506989
2022	70.691095