Year	% of cohort
1960	59.994542
1961	61.035468
1962	62.016147
1963	63.019917
1964	64.432289
1965	64.986227
1966	65.479813
1967	65.645199
1968	66.257417
1969	66.297449
1970	65.897887
1971	66.025092
1972	66.736684
1973	67.10851
1974	67.652054
1975	68.335608
1976	68.90722
1977	69.686728
1978	70.471747
1979	71.227124
1980	71.599526
1981	72.496216
1982	73.184675
1983	73.518725
1984	73.327286
1985	73.410159
1986	73.402407
1987	73.733222
1988	73.156045
1989	73.056533
1990	73.062433
1991	73.121638
1992	73.331518
1993	73.106725
1994	72.792052
1995	73.140054
1996	73.416763
1997	73.294101
1998	73.828399
1999	74.513795
2000	75.03426
2001	75.636487
2002	75.964976
2003	76.158028
2004	77.095557
2005	77.420802
2006	77.422477
2007	78.046155
2008	78.119468
2009	78.383514
2010	78.892935
2011	79.318096
2012	79.593706
2013	79.888748
2014	80.143901
2015	80.386516
2016	80.663245
2017	80.876747
2018	81.149229
2019	81.41558
2020	81.647407
2021	81.948644
2022	82.145374