Year	% of cohort
1960	27.977630705789995
1961	28.149296871017558
1962	29.078620350357795
1963	29.199964322960366
1964	29.699855347917392
1965	29.839552319905877
1966	30.202049316051458
1967	29.827682385891258
1968	30.60633730534191
1969	30.973504135191728
1970	32.03435748294332
1971	32.8207824641695
1972	33.220758653800225
1973	34.59884211777325
1974	35.023099243262294
1975	35.647091481583956
1976	36.49309637154817
1977	37.15286060859752
1978	37.296993412744264
1979	37.72519726623572
1980	37.516645957283004
1981	37.719077282879724
1982	37.775036315870416
1983	37.28087019695269
1984	36.58510215675518
1985	36.68545308637859
1986	37.31430794345318
1987	36.35528889463441
1988	35.76891402173115
1989	37.55163318034317
1990	37.3805845673992
1991	37.4477770759517
1992	37.21136544212793
1993	37.76469181175041
1994	39.0859724379284
1995	38.5912099548793
1996	38.36456466131353
1997	38.6579233975658
1998	37.77153275363762
1999	39.40342333966191
2000	40.84606184706812
2001	41.37277357659231
2002	41.91543567911803
2003	42.46955901156162
2004	43.00358652348697
2005	43.82753255278649
2006	44.72756810199677
2007	45.41499106875192
2008	46.27182528763192
2009	47.41668651734948
2010	48.14763959883328
2011	49.00411455186483
2012	49.72085396990322
2013	50.31815534014216
2014	50.913937979520256
2015	51.506466908569664
2016	52.09213319044704
2017	52.69068938356778
2018	53.39925736481666
2019	53.94171510258876
2020	52.14415242701024
2021	50.89667797266379
2022	52.32314171612251