Year	% of cohort
1960	78.42497836110235
1961	79.04716182295304
1962	78.8221780039462
1963	78.6372626108216
1964	78.94219567263926
1965	79.1685836610252
1966	79.34734712469232
1967	79.69700964281733
1968	79.34548225235906
1969	79.769296904025
1970	79.92454931448408
1971	80.38934604857401
1972	80.62883159355015
1973	80.8543576005777
1974	81.5027071508679
1975	82.1399780472271
1976	82.50527388038783
1977	82.87704257803011
1978	83.1309557654486
1979	83.67491696719824
1980	83.65289877708805
1981	83.94011264842314
1982	84.31647233286513
1983	84.42763041033203
1984	84.56580124539883
1985	84.62389558181722
1986	84.7744271093227
1987	84.89046859110363
1988	84.89099902516047
1989	85.18953667912844
1990	85.48345475671421
1991	85.60409335512863
1992	85.86868033852555
1993	85.7285031109444
1994	85.87392805941535
1995	85.94180688243954
1996	86.19811394047493
1997	86.45761940680967
1998	86.71899686006581
1999	86.75408338038243
2000	86.86295053277799
2001	86.91912788971867
2002	87.00564785324231
2003	87.05825238942532
2004	87.40194067670471
2005	87.44676357593272
2006	87.63243533602306
2007	87.88429745105084
2008	87.98161231628093
2009	88.0881600554332
2010	88.40518485231192
2011	88.38270167219567
2012	88.42720290365281
2013	88.4107425617027
2014	88.26422962494398
2015	88.14870081330164
2016	87.96019022705583
2017	87.98238488714539
2018	88.159012585844
2019	88.24177467255082
2020	87.02442178559646
2021	85.99898899321836
2022	87.0651507650488