Year	% of cohort
1960	37.3188949802897
1961	37.743450546944686
1962	38.33147214269434
1963	38.816971541346874
1964	39.34738722727641
1965	37.9752895552866
1966	38.681109205166074
1967	39.11339211218451
1968	41.19009333625081
1969	41.6532806805519
1970	41.54479988920934
1971	38.067743913644556
1972	43.34935538446374
1973	44.048270664191676
1974	44.75969881126686
1975	45.523131535952295
1976	46.090453127822585
1977	46.43825754440974
1978	46.83235040612813
1979	47.168115985305946
1980	47.66478360865023
1981	48.291850953844126
1982	48.935187498005256
1983	49.708513209097056
1984	50.39348299339486
1985	51.14424065622802
1986	51.964248421352345
1987	52.449690894299735
1988	52.93207970197967
1989	53.403969538967836
1990	54.08099483506614
1991	54.2676292207946
1992	55.12636570663289
1993	55.60195680289491
1994	56.07573932961418
1995	56.499141268825255
1996	56.97278839521496
1997	57.48867737325949
1998	58.23941824758094
1999	59.10889160402039
2000	59.39800666527655
2001	59.89815634270066
2002	60.5682972209675
2003	61.190666636057976
2004	61.6929121608073
2005	62.2211793238445
2006	62.78906030904452
2007	63.006051943912446
2008	63.27846702454865
2009	63.59143772044284
2010	64.23607501539138
2011	64.70263665967504
2012	65.3321723883859
2013	65.98831145256575
2014	66.89337957417146
2015	67.725859304045
2016	68.44706776825944
2017	68.9475980306385
2018	69.34173420411894
2019	69.57883452464297
2020	68.02290123611878
2021	62.944599478393464
2022	64.3874321576787