Annual % of cohort
1960 63.51469860128971
1961 64.1241053818924
1962 63.98140592407432
1963 64.11482414386755
1964 64.78182899733284
1965 64.94805119299431
1966 65.30254445513565
1967 65.73138070724305
1968 65.58576189941401
1969 65.4888669191188
1970 66.04593312921354
1971 66.53829269517341
1972 66.88403129508846
1973 67.26751516640705
1974 67.90521335009397
1975 68.2226437609454
1976 68.5751566522299
1977 69.07048582759214
1978 69.29478797947104
1979 69.85561036342763
1980 69.95376695991816
1981 70.7190231665852
1982 71.27065400533792
1983 71.39357885271608
1984 71.86069375390665
1985 72.06258000836488
1986 72.5564018372994
1987 72.97584378653005
1988 73.26308930199153
1989 73.55150312937339
1990 73.86839584673895
1991 74.12459629512526
1992 74.54200712718855
1993 74.82668924722614
1994 75.26577058892276
1995 75.55646529097201
1996 76.26295177934152
1997 77.04369335350522
1998 77.48952767869415
1999 77.81736965570593
2000 78.4175240816845
2001 78.82665124976448
2002 79.15360564572183
2003 79.3776210266374
2004 79.91608258818913
2005 80.08374007586208
2006 80.42391480436265
2007 80.67426885393778
2008 80.9636731037289
2009 81.29171284349205
2010 81.65268882179929
2011 81.85807097396662
2012 82.19682247695366
2013 82.46499371837713
2014 82.71879211138021
2015 82.643978807605
2016 82.66920775014952
2017 82.78993312004472
2018 82.86524673951907
2019 83.1005718510646
2020 80.8137936338172
2021 80.12026101389824
2022 82.47564061032101