Year	% of cohort
1960	64.18123605074676
1961	64.9822297839874
1962	64.66059793920196
1963	64.18595335988725
1964	64.33522067075057
1965	64.35095833779054
1966	64.13213129673198
1967	64.54644148367345
1968	63.94236772203658
1969	64.4165320665257
1970	64.78547260848279
1971	65.56193571984494
1972	65.55940696868751
1973	66.05948018108681
1974	67.13747291204145
1975	68.07802042447386
1976	68.77178807249987
1977	69.4028624179859
1978	69.86631071085053
1979	70.64875879216505
1980	70.89700890976408
1981	71.60482329703635
1982	72.39993632526625
1983	72.85056908313669
1984	73.11098970559794
1985	73.17710587011548
1986	73.38845555829032
1987	73.69176020784658
1988	73.79838810113904
1989	74.18341656874887
1990	74.66535669091141
1991	74.99376392653402
1992	75.44452927650066
1993	75.32954013124531
1994	75.59006176484668
1995	75.95835289522712
1996	76.87796241640771
1997	77.88967448606714
1998	78.42970556257413
1999	78.6683657037449
2000	78.92776444658402
2001	79.07670003339558
2002	79.14063588079905
2003	79.27566174654024
2004	79.79442786936552
2005	79.72477858336919
2006	80.03261384587404
2007	80.35075499432017
2008	80.56379161067933
2009	80.91183079475894
2010	81.31106124250398
2011	81.34702659764933
2012	81.37783499682313
2013	81.32876967248293
2014	81.22784050219872
2015	80.96308313203055
2016	80.58974396399176
2017	80.52766875671581
2018	80.66729448938308
2019	80.75517032274173
2020	78.19952967301829
2021	76.75151560778791
2022	78.70627603595645