Year	% of cohort
1960	27.85159861421295
1961	32.686299519365654
1962	40.049512431264134
1963	41.03806917393806
1964	42.08312842546553
1965	41.711552700844116
1966	43.70118367628456
1967	44.99194513527494
1968	45.947306286012434
1969	46.89346511563686
1970	47.957119966590916
1971	49.474328118132
1972	50.61469460588468
1973	51.90246522334126
1974	52.7563107291782
1975	53.68683602876827
1976	54.76324543210238
1977	55.70601250842618
1978	56.516277567402
1979	57.44865946005599
1980	58.11492652055878
1981	58.732886291036515
1982	59.57369244611017
1983	60.39165194999417
1984	61.30021538002131
1985	62.03897269101955
1986	62.838886293829425
1987	63.40364530873531
1988	63.823290831652926
1989	64.50647254178467
1990	64.75951566241301
1991	65.38162132483444
1992	65.99086998356265
1993	66.46680543743707
1994	67.0513770417932
1995	67.50845137559138
1996	68.01226314745216
1997	68.60147431282948
1998	69.14889331135936
1999	69.60525594649069
2000	70.06230660310673
2001	70.59767757003205
2002	71.10135737944246
2003	71.40936526486209
2004	71.69691379783919
2005	72.39423652643656
2006	72.88634213264517
2007	73.2260967085602
2008	73.48650310193364
2009	74.10211376002283
2010	74.47461886622781
2011	74.89070837353565
2012	75.30576394367466
2013	75.70429659304368
2014	76.20848541025285
2015	76.49808076789552
2016	76.67874154106819
2017	76.7664111185985
2018	77.47288408018018
2019	77.79781643347665
2020	75.84720512743671
2021	75.17834740639239
2022	76.6756471581472