Year	% of cohort
1960	42.647253
1961	43.394025
1962	44.057969
1963	44.858532
1964	45.874316
1965	46.696319
1966	47.478492
1967	48.191914
1968	48.898164
1969	49.632258
1970	50.374995
1971	50.954173
1972	51.712415
1973	52.370438
1974	53.05541
1975	53.66411
1976	54.403418
1977	55.23992
1978	56.278862
1979	56.726869
1980	57.099263
1981	57.710811
1982	57.672124
1983	58.427572
1984	58.671023
1985	59.364224
1986	59.577878
1987	59.992024
1988	59.640343
1989	59.949763
1990	59.532986
1991	59.404665
1992	59.062565
1993	59.557617
1994	59.182642
1995	59.05737
1996	58.702674
1997	58.650354
1998	58.408353
1999	58.555161
2000	59.421645
2001	59.496957
2002	59.367933
2003	60.525365
2004	60.428734
2005	60.493723
2006	61.592251
2007	62.027327
2008	63.423914
2009	63.919492
2010	65.385554
2011	65.689748
2012	67.066478
2013	67.357012
2014	67.627908
2015	68.747935
2016	68.707608
2017	70.375975
2018	70.203856
2019	70.237079
2020	70.985533
2021	69.587905
2022	69.346487