Year	% of cohort
1960	21.800002317496528
1961	27.721998212800056
1962	37.039692427866235
1963	37.83855097268585
1964	39.02871964227618
1965	38.41770964386677
1966	40.86089600489936
1967	42.453861309492694
1968	43.36389849961807
1969	44.66465800726566
1970	45.92555646081637
1971	47.600207160400956
1972	48.65864292419399
1973	50.33824646720664
1974	51.273101786940956
1975	52.76700071724841
1976	54.194515411646094
1977	55.33580103480621
1978	56.34359908005656
1979	57.43078533354352
1980	58.39889592026914
1981	59.341129316587136
1982	60.24177742300844
1983	60.99361871026447
1984	61.81641166489123
1985	62.56648479881425
1986	63.17797908840974
1987	63.8415299484855
1988	64.3379075951512
1989	64.93916702284037
1990	65.39333350098863
1991	66.09028461022025
1992	66.93438520482566
1993	67.54218510804284
1994	68.09488847205223
1995	68.49125299266987
1996	68.92313577506185
1997	69.5514193168697
1998	70.05806496302561
1999	70.55681201030532
2000	71.03393559260739
2001	71.5846292906225
2002	72.16268150930236
2003	72.73338201034412
2004	72.91409353899076
2005	73.65362091662706
2006	74.17708962841765
2007	74.48921686758491
2008	74.4468811931257
2009	75.1207114960418
2010	75.45998342987819
2011	75.8074807082445
2012	76.07811015091328
2013	76.3863946091123
2014	76.81103589558232
2015	77.05379881782329
2016	77.24592126349488
2017	77.1096638104463
2018	77.87270534401402
2019	78.20083909366353
2020	77.90672207633527
2021	77.16205807740802
2022	78.22658015183475