Annual % of cohort
1960 77.81671274059661
1961 78.43783819879891
1962 78.4434699644499
1963 78.8012025367268
1964 79.48868431464935
1965 79.71873327890218
1966 80.12258272054716
1967 80.51399570981211
1968 80.51306935440186
1969 80.55406290982562
1970 80.92536575581339
1971 81.37711011035219
1972 81.70135571579094
1973 82.01964887673978
1974 82.47357977767284
1975 82.89721178021423
1976 83.23816498109987
1977 83.64711166472296
1978 83.91071624481724
1979 84.33045078979875
1980 84.38492480825062
1981 84.86645274846252
1982 85.14956781882536
1983 85.22558860444329
1984 85.55244166032755
1985 85.68758432304804
1986 86.04016657912281
1987 86.2343599093907
1988 86.39872666408338
1989 86.68475089147516
1990 86.90302003040638
1991 87.02572647649181
1992 87.1833604799349
1993 87.16474486189057
1994 87.48800143243633
1995 87.54384887580645
1996 87.84612001247667
1997 88.11023269348043
1998 88.37111202286258
1999 88.4813953782003
2000 88.6620093634728
2001 88.8638199223027
2002 88.96811732395594
2003 89.05148163930534
2004 89.38186744655897
2005 89.45786939800679
2006 89.68553930218127
2007 89.84980442239114
2008 89.97213507320212
2009 90.14576692477434
2010 90.34812140465185
2011 90.38560747027097
2012 90.59662474695202
2013 90.67297109062002
2014 90.81746801503
2015 90.84080735007073
2016 90.90259470744478
2017 91.01985984765837
2018 91.09711937928746
2019 91.2345231975733
2020 90.55994030594259
2021 90.09298331342536
2022 90.60363593596503