Year	% of cohort
1960	29.67300927710254
1961	29.91842135528963
1962	30.72463176186682
1963	30.81390678389159
1964	31.31298663085732
1965	31.443988278603527
1966	31.42556741738769
1967	31.341544680611022
1968	32.00608817504197
1969	32.31505172870155
1970	33.180365789563645
1971	33.80468840302197
1972	33.97890689424528
1973	35.143702364414274
1974	35.42723751549917
1975	35.948115770163874
1976	36.69693943165019
1977	37.22985958367232
1978	37.43671763007665
1979	38.120373728474306
1980	38.618896044179934
1981	39.1064123400583
1982	39.30304705444928
1983	38.093840633982474
1984	37.81062678809831
1985	38.00574241699607
1986	38.38969400496729
1987	38.44399263229295
1988	37.94944256372351
1989	39.02481874097252
1990	38.597902247189985
1991	38.445855987958915
1992	37.91352057832973
1993	37.97626693467041
1994	38.764080688760195
1995	38.50570446362201
1996	38.166437632571785
1997	38.332520822140914
1998	37.586264213486984
1999	38.537022130795954
2000	39.84907929393123
2001	40.144804728266564
2002	40.47293934154893
2003	41.08356001890561
2004	41.70544271488543
2005	42.52528691014343
2006	43.66295828477517
2007	44.50312502802851
2008	45.354017746205365
2009	46.40198160706468
2010	47.373929809475015
2011	48.40156013262469
2012	49.29855492071132
2013	50.00879383959247
2014	50.70498197900823
2015	51.34001914553844
2016	52.203800489055475
2017	52.85866842761272
2018	53.431202222311306
2019	54.058819406811644
2020	52.52254657649088
2021	50.767493971906866
2022	51.927465775624526