Annual % 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